Tonsillectomy

What this procedure is

A tonsillectomy is a surgical procedure to remove the tonsils. The tonsils are two small, oval-shaped pads of tissue located at the back of the throat, with one on each side. These pads are part of the immune system, but removing them generally does not lower a person's ability to fight off future infections.

The surgery is performed while you are under general anesthesia. This is a combination of medicines that puts you into a deep, sleep-like state so you do not feel pain or have any memory of the procedure. The surgeon removes the tissue through the mouth, which means there are typically no visible cuts or scars on the outside of the neck or face.

What it treats or fixes

Your clinician may recommend a tonsillectomy to address several different health concerns. The most common reasons for the procedure include:

• Recurring infections: This includes frequent bouts of tonsillitis (inflammation of the tonsils) or strep throat that happen multiple times a year despite treatment.
• Sleep-disordered breathing: If the tonsils are naturally large or become swollen, they can block the airway during sleep. This may lead to obstructive sleep apnea, a condition where breathing repeatedly stops and starts during the night.
• Chronic issues: The procedure may be used to treat persistent infections that do not improve with antibiotics or to manage complications like a peritonsillar abscess (a collection of fluid or infection behind the tonsil).

How common it is & where it's done

Tonsillectomy is one of the most frequently performed surgeries in North America. While it is very common among children, many adults also have their tonsils removed to improve their quality of life or resolve chronic health issues.

In most cases, this is an outpatient procedure, meaning you can usually go home the same day after a brief period in a recovery room. The surgery is typically performed in a hospital or a specialized outpatient surgery center. Your medical team will monitor you closely after the procedure to ensure you are ready to return home for recovery.

Recovery: What to Expect

Recovery from a tonsillectomy (the surgical removal of the tonsils) usually takes about 10 days to two weeks. Most people experience some pain in the throat, which may also feel like an earache. Your clinician may suggest a schedule for over-the-counter or prescription pain relief to keep you comfortable during this time.

• Hydration: Drinking plenty of fluids is the most important part of recovery to prevent dehydration. Water, ice chips, and fruit juice are good choices.
• Diet: Stick to soft foods that are easy to swallow, such as applesauce, broth, or yogurt. It is best to avoid crunchy, spicy, or acidic foods while the area heals.
• Rest: Plan for several days of quiet rest. Most children and adults can return to school or work once they are eating normally and sleeping through the night without needing regular pain medication.

Risks & Possible Complications

While a tonsillectomy is a very common procedure, all surgeries carry some risks. Your surgical team takes many steps to keep you safe. Possible complications may include:

• Bleeding: Small amounts of dark blood are common, but your clinician should be notified if there is bright red bleeding during or after the healing process.
• Reaction to anesthesia: Some people may feel nauseated or have a headache shortly after the medicine used to put them to sleep wears off.
• Swelling: The tongue or the roof of the mouth may feel swollen for a few days, which can sometimes cause a feeling of fullness in the throat.

You should contact your clinician if you experience a high fever, cannot keep liquids down, or notice bleeding that does not stop quickly. These issues are manageable when addressed early.

Outcomes & Long-Term Results

The goal of a tonsillectomy is to improve your long-term health and comfort. For those who have frequent throat infections, such as strep throat, the surgery often reduces the number and severity of these illnesses. While you may still get occasional colds, the overall frequency of severe sore throats usually decreases significantly.

If the surgery was performed to help with sleep-disordered breathing (like snoring or sleep apnea), many patients find they sleep more soundly and feel more rested during the day. Your clinician may schedule a follow-up visit to ensure the area has healed completely and that your symptoms have improved as expected.

Emotional Support & Reassurance

It is natural to feel a bit nervous before any surgery. Remember that tonsillectomies are one of the most frequently performed procedures, and your medical team is highly experienced in helping patients through both the surgery and the recovery process.

Focusing on the long-term benefits—such as better sleep or fewer sick days—can help you stay positive during the short recovery period. If you have specific concerns, your clinician is there to answer your questions and help you feel prepared for a smooth and successful experience.

Why doctors recommend it

A clinician may suggest a tonsillectomy—the surgical removal of the tonsils—if a patient deals with frequent or long-lasting throat infections. These infections, known as tonsillitis, can cause pain, fever, and swelling. If these episodes happen many times a year or do not get better with antibiotics, surgery might be the next step.

Another common reason for this procedure is when the tonsils are naturally large or become swollen. This can lead to complications such as:

• Sleep apnea: A condition where breathing stops and starts during sleep because the airway is blocked by the tonsils.
• Difficulty swallowing: Large tonsils can make it hard to eat or drink comfortably.
• Peritonsillar abscess: A collection of pus that forms near the tonsils due to a severe infection.

Urgent vs planned treatment

In most cases, a tonsillectomy is a planned, or elective, procedure. This means you and your clinician have time to discuss the benefits and decide on a schedule. It is often considered after other treatments, like antibiotics for infections or observation for mild breathing issues, have not fully solved the problem.

While rare, there are times when the procedure may be more urgent. If enlarged tonsils cause a severe blockage that makes it very difficult to breathe or swallow, a clinician may move more quickly to perform the surgery. Similarly, if a serious infection or abscess does not respond to medication, more immediate care might be recommended to protect the airway.

Goals of treatment

The main goal of a tonsillectomy is to improve a person's quality of life by reducing health disruptions. For those with frequent infections, the goal is to have fewer sore throats and fewer missed days of school or work. While the surgery may not prevent every future cold, it aims to stop the severe, recurring bouts of tonsillitis.

For patients with sleep-disordered breathing, the goal is to clear the airway. This helps the patient breathe more easily at night, which can lead to better rest and more energy during the day. Success is often measured by how much more comfortably a patient can breathe, sleep, and eat after the recovery period is over.

Who may benefit

A tonsillectomy is a common surgery to remove the tonsils, which are the two oval-shaped pads of tissue at the back of the throat. Your clinician may suggest this procedure if you or your child experience frequent bouts of tonsillitis, which is an infection or inflammation of the tonsils. This often means having several severe throat infections within a single year or over a period of several years.

Another common reason for surgery is to treat breathing problems. Some people have enlarged tonsils that cause obstructive sleep apnea, a condition where breathing stops and starts during sleep because the airway is partially blocked. Removing the tonsils can help open the airway and improve sleep quality and daily energy levels.

In some cases, a clinician may recommend the procedure for other specific concerns. These can include a peritonsillar abscess (a collection of pus that forms near a tonsil), persistent bad breath caused by debris trapped in the tonsil folds, or suspected growths in the throat area.

When it may not be the right option

Surgery is not always the first step for managing throat issues. If infections are mild, happen rarely, or respond well to antibiotics, your care team might suggest a "watchful waiting" approach. This involves monitoring the symptoms over time to see if the frequency of illness decreases on its own as a child grows older.

A tonsillectomy may not be recommended if a person has certain underlying health conditions. For example, those with known bleeding disorders may face higher risks during and after the procedure. Additionally, if you have an active infection on the day of surgery, your clinician will likely wait until you are healthy before proceeding.

General health and the risks of anesthesia (the medicine that puts you to sleep for surgery) are also carefully considered. If the potential benefits of the surgery do not clearly outweigh the risks, your care team may explore other medical treatments first.

Questions to ask your care team

Deciding on surgery is a collaborative process between you and your healthcare provider. You may find it helpful to bring a list of questions to your next appointment to better understand the options available to you.

• How many throat infections have been documented over the last year, and do they meet the standard criteria for surgery?
• Are there non-surgical treatments, such as allergy management or different medications, we should try first?
• If the main concern is sleep, would a sleep study be helpful before deciding on surgery?
• What are the specific goals we hope to achieve by removing the tonsils?
• What is the typical recovery time for someone of my or my child's age?
• What are the risks if we decide to wait and monitor the symptoms instead of having surgery now?

In the procedure room

When it is time for the surgery, you will be moved into a specialized procedure room. A team of healthcare professionals will be there to care for you, including your surgeon, an anesthesiologist (a doctor who specializes in sleep medicine), and several nurses.

The room is kept very clean and organized. You will lie on a comfortable table, and the team will help you get into the right position. They will place small sensors on your skin to monitor your health during the process.

High-level steps

The surgeon will use a specialized tool to carefully remove the tonsils, which are the two small pads of lymphoid tissue at the back of your throat. There are several ways to do this, such as using heat, cold, or sound waves to separate the tissue and stop any bleeding.

Once the tonsils are removed, the surgeon will check the area to ensure everything is clear. In most cases, the surgical sites are left open to heal on their own rather than being closed with stitches. This allows the throat to heal naturally over the next few weeks.

Anesthesia and pain control

A tonsillectomy is almost always performed under general anesthesia. This means you will be in a deep, sleep-like state. You will not feel any pain or have any memory of the surgery while it is happening.

Your clinician may also use a local anesthetic—a numbing medication—in the throat area. This helps keep you comfortable immediately after you wake up. Throughout the process, the anesthesia team carefully manages your comfort levels to ensure a smooth experience.

Monitoring and safety steps

Your safety is the top priority for the surgical team. During the entire procedure, specialized equipment is used to track your vital signs. This includes monitoring your:

• Heart rate: To ensure your heart is beating steadily.
• Blood pressure: To keep your circulation stable.
• Oxygen levels: To make sure you are breathing well while asleep.

The anesthesiologist stays by your side the whole time to adjust medications as needed and ensure you remain safely asleep until the procedure is finished.

Immediately after the procedure

After the surgery is finished, you will be moved to a recovery room. Nurses will watch you closely as the anesthesia wears off and you begin to wake up. They will check your breathing and look for any signs of bleeding in the throat.

As you wake up, you might feel some pressure or a "full" sensation in your throat. It is normal to feel sleepy, slightly nauseated, or have a sore throat. Your care team will provide fluids and may offer ice chips or medication to help with any discomfort or numbness you notice.

Typical procedure length

The actual removal of the tonsils is a relatively quick process. It typically takes about 20 to 30 minutes for the surgeon to complete the steps.

While the surgery itself is short, you should expect to spend more time at the facility. This includes the time needed for the anesthesia to take effect before the surgery and the time spent in the recovery room afterward to ensure you are ready to go home.

Common approaches (open vs minimally invasive)

Tonsillectomy is almost always performed through the open mouth. This means there are usually no cuts made on the outside of the face or neck. While the entry point is the same, surgeons may use different tools to remove the tonsil tissue and stop bleeding.

• Cold knife (scalpel): The surgeon uses a steel blade to cut the tonsil out. This is a traditional method that is very precise.
• Electrocautery: This tool uses heat to remove the tonsil and seal blood vessels at the same time. This helps prevent bleeding during the surgery.
• Coblation: This method uses radiofrequency energy and a saline solution to break down tissue at a lower temperature. It is designed to be gentler on the surrounding throat tissue.
• Ultrasonic vibration: Some tools use high-speed vibrations to cut tissue and stop bleeding simultaneously.

Partial vs total

Your clinician will decide how much tissue to remove based on your specific history, such as whether you have chronic infections or sleep apnea.

• Total tonsillectomy: The surgeon removes the entire tonsil, including the thin outer layer known as the capsule. This is the standard approach for recurrent infections because it ensures all infected tissue is gone.
• Partial (intracapsular) tonsillectomy: The surgeon removes the bulk of the tonsil tissue but leaves the outer capsule in place. This layer acts like a natural bandage over the throat muscles, which may reduce pain and lower the risk of bleeding during recovery. This is often used for enlarged tonsils causing breathing problems.

Revision or repeat procedures

Most patients only require one surgery to fix the problem. However, it is possible for tonsil tissue to grow back over time. This is generally more likely to happen after a partial tonsillectomy than a total one, because a small amount of tissue is intentionally left behind.

If the tissue regrows and causes symptoms again—such as snoring, sleep apnea, or new infections—your doctor may suggest a revision surgery to remove the remaining tissue. While this is not common, it is a potential outcome to be aware of.

Tests and imaging that may be done

Before surgery, your healthcare provider will review your medical history and perform a physical exam. For many patients, extensive testing is not required. However, your clinician may order specific tests based on your health needs.

• Blood tests: Your doctor may check your complete blood count or order tests to see how well your blood clots. This is often done if you have a personal or family history of bleeding disorders.
• Sleep study (polysomnography): If the surgery is being done to treat obstructive sleep apnea, your doctor may recommend a sleep study. This test measures your breathing and oxygen levels while you sleep.

Medication adjustments

Tell your care team about all the medicines, vitamins, and dietary supplements you take. Some drugs can increase the risk of bleeding during or after the procedure. Your doctor will provide a plan for which medicines to take and which to pause.

Common medications that clinicians may ask you to stop taking several days before surgery include:

• Aspirin
• Non-steroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen or naproxen
• Blood thinners (anticoagulants)

Note: Only stop medicines if your clinician instructs you to do so. They will tell you exactly when to stop and when it is safe to restart them.

Day-before and day-of instructions

Your surgery center or hospital will provide a checklist to help you get ready. Following these rules is essential for your safety while under general anesthesia.

• Fasting: You will usually be instructed not to eat or drink anything after midnight the night before surgery. Having an empty stomach helps prevent nausea and complications during the procedure.
• Transportation: Because anesthesia makes you drowsy, you cannot drive yourself home. You must arrange for a friend or family member to pick you up.
• Arrival time: Plan to arrive at the facility early to complete paperwork and prepare for the surgery.
• Recovery planning: Prepare to take time off work or school. Recovery typically takes at least 10 days to two weeks.

General surgical risks

Tonsillectomy is a common procedure, but like all surgeries, it carries general risks. Reactions to anesthesia are possible, though usually minor. You or your child might feel nauseous, vomit, or have a headache as the medication wears off. Serious reactions to anesthesia are rare.

Infection is another general risk associated with surgery. However, serious infections after tonsil removal are uncommon because the throat has a strong immune system. Your surgical team takes careful steps to minimize this risk.

Procedure-specific complications

The most common complication specific to this surgery is bleeding. This can happen immediately after surgery or during the healing process. It is most likely to occur about 5 to 10 days after the procedure when the scabs fall off. While small specks of blood can be normal, bright red blood is a sign to seek medical help immediately.

Other potential issues include:

• Swelling: The tongue and the soft roof of the mouth (soft palate) may swell. This can cause temporary snoring or breathing changes, which usually improve as healing progresses.
• Dehydration: Because swallowing can be painful, patients may avoid drinking. This can lead to dehydration, which increases pain and delays healing.
• Rare effects: In very rare cases, patients may experience temporary changes in taste or minor injury to the teeth, though surgeons take great care to protect the mouth.

How complications are treated

Most complications are manageable with prompt care. If dehydration occurs, your clinician may provide fluids through a vein (IV) to restore hydration levels. Nausea and vomiting are typically treated with medication to help you feel more comfortable.

If bleeding occurs after you go home, you should go to the emergency room or contact your doctor right away. Treatment depends on the severity:

• Observation: For minor bleeding, the care team may simply watch you closely in the hospital to ensure the bleeding stops and does not return.
• Surgical treatment: If bleeding is significant, the surgeon may need to seal the bleeding area. This is often done in the operating room to ensure safety.

Pain control medicines

Managing discomfort is a key part of recovery after a tonsillectomy. Your clinician will likely recommend a combination of medicines to keep you comfortable. Common options include over-the-counter pain relievers like acetaminophen or non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen. These help reduce swelling and soreness in the throat.

In some cases, your clinician may prescribe stronger pain medication for a short period. It is important to follow the specific schedule provided by your care team. They will tailor the plan to your needs, taking into account any allergies or other health conditions you may have. Always check with your clinician before mixing different types of pain relievers.

Antibiotics

Antibiotics are medicines used to treat or prevent infections caused by bacteria. While they were once common after this surgery, they are not always necessary for every patient. Your clinician will decide if you need them based on your medical history and the details of your procedure.

If an antibiotic is prescribed, it is important to take the full course as directed, even if you start feeling better. This helps ensure any bacteria are fully cleared. If you have a known allergy to certain antibiotics, such as penicillin, be sure to remind your surgical team so they can choose a safe alternative.

Blood thinners and clot prevention

Before your surgery, your clinician will review any medications you take that might affect how your blood clots. These are often called blood thinners or anticoagulants. You may be asked to stop taking certain medicines, such as aspirin or specific prescription thinners, several days before the procedure to reduce the risk of bleeding.

Your care team will provide clear instructions on when to stop these medications and when it is safe to start them again after surgery. It is also important to avoid herbal supplements or vitamins that might interfere with clotting unless your clinician says otherwise. Following these steps helps the surgical site heal properly and safely.

Emergency warning signs

While recovery is usually safe, certain symptoms require immediate attention. If you or your child experiences any of the following, go to the emergency room or call emergency services right away:

• Bright red bleeding: Seeing small specks of dark, dried blood in saliva or from the nose can be normal. However, bright red blood indicates active bleeding. This requires immediate medical care.
• Trouble breathing: Snoring or noisy breathing is often caused by swelling and is common in the first week. However, struggling to breathe or gasping for air is an emergency.

Call your surgeon or clinic if…

Contact your care team if you notice issues that are not emergencies but still need medical advice. Your clinician may want to adjust medications or check for infection if you experience:

• Fever: A low-grade fever is common right after surgery. Call if the temperature rises to 102°F (38.9°C) or higher.
• Dehydration: Pain can make it hard to swallow fluids. Call if there is reduced urination (peeing less often), severe thirst, weakness, headache, or dizziness.
• Uncontrolled pain: If prescribed pain medicine does not help, or if pain prevents drinking fluids entirely, let your doctor know.
• Persistent vomiting: Vomiting once or twice after surgery can happen, but frequent vomiting increases the risk of dehydration.

Expected vs concerning symptoms

It can be hard to tell what is part of normal healing and what is a problem. Most people have significant discomfort, but specific changes warrant a call.

• Pain: It is expected to have a sore throat, and often ear or jaw pain, for up to two weeks. It is concerning if the pain becomes so severe that you cannot swallow liquids or take medication.
• Appearance of the throat: It is expected to see white, yellow, or gray patches in the back of the throat. These are scabs, not an infection, and they may cause bad breath. It is concerning if you see bright red blood.
• Energy levels: It is expected to feel tired or groggy for several days. It is concerning if you feel extremely weak, dizzy, or lightheaded, as this may be a sign of dehydration.

Non-surgical treatments

For many people, the first step in managing tonsillitis (inflammation of the tonsils) involves medical treatments rather than surgery. If a bacterial infection like strep throat is the cause, your clinician may prescribe a course of antibiotics. These medications help clear the bacteria and reduce symptoms. If the infection is caused by a virus, antibiotics will not work, so the focus shifts to supportive care.

Supportive care includes simple steps to help the body heal itself. Your care team might suggest:

• Getting plenty of rest to help the immune system.
• Drinking extra fluids to stay hydrated.
• Using over-the-counter pain relievers to reduce fever and throat pain.
• Gargling with warm salt water to soothe discomfort.

While these treatments can manage a single episode of illness, they do not always prevent future infections from happening. If the infections keep coming back, your clinician may look at other long-term options.

Watchful waiting

Watchful waiting is a period where you and your clinician monitor the condition closely without scheduling surgery right away. This approach is very common because many people, especially children, naturally outgrow frequent throat infections as their immune systems mature. During this time, your clinician may ask you to keep a detailed record of every sore throat, fever, and doctor visit.

This monitoring period helps determine if the infections are a temporary phase or a long-term problem. Clinicians often use specific guidelines to track these episodes. For example, they may wait to see if a patient has at least seven infections in one year before considering surgery. If the number of infections starts to drop on its own, surgery may not be necessary at all.

When surgery becomes the best option

Surgery may become the best choice when non-surgical treatments and watchful waiting do not provide enough relief. One of the main reasons for a tonsillectomy is the frequency of illness. Your clinician may recommend surgery if you or your child has had at least seven infections in the past year, five per year for the last two years, or three per year for the last three years.

Beyond frequent infections, surgery is often suggested to treat complications caused by enlarged tonsils. These complications include:

• Obstructive sleep apnea: A condition where the airway is blocked during sleep, causing breathing to stop and start.
• Difficulty swallowing: When tonsils are so large that it becomes hard to eat or drink comfortably.
• Chronic tonsillitis: A persistent infection that does not get better with antibiotics.
• Peritonsillar abscess: A collection of infection or pus behind the tonsil that does not respond to other treatments.

In these cases, the goal of surgery is to improve the quality of life by helping the patient breathe better, sleep more soundly, and avoid the constant cycle of illness.

Hospital services that commonly perform this surgery

A tonsillectomy is most often performed in the Otolaryngology department. This is the medical specialty focused on the ears, nose, and throat (ENT). Your clinician may perform the surgery in a traditional hospital or at an ambulatory surgery center, which is a facility specifically designed for procedures where the patient usually goes home the same day.

In these settings, specialized teams of surgeons, nurses, and anesthesiologists (doctors who manage pain and sleep during surgery) work together. Because this is one of the most common surgeries in North America, many facilities have dedicated units for both adult and pediatric (child) care to ensure patient comfort.

Patient resources and support services

Most hospitals provide resources to help you or your child feel prepared for the procedure. These support services may include:

• Pre-operative education: Many centers offer guides, brochures, or videos explaining what to expect before, during, and after the surgery.
• Child Life Specialists: For younger patients, these professionals use play and age-appropriate language to help reduce fear and anxiety about the hospital environment.
• Recovery support: Facilities often provide a 24-hour contact number so you can reach a nurse or clinician if you have questions about pain management or diet once you are home.

Your surgical team may also provide specific instructions on hydration and soft foods to help ensure a smooth recovery period at home.

Questions for choosing where to have surgery

When deciding where to have a tonsillectomy, it can be helpful to ask the following questions to ensure the facility meets your needs:

• Is the facility accredited and experienced in performing tonsillectomies for my specific age group?
• Will the surgery be performed as an outpatient procedure, or is an overnight stay an option if the clinician recommends it?
• What kind of support is available if I have concerns about recovery during the night or over the weekend?
• Does the facility have specialized staff, such as pediatric nurses, if the patient is a child?
• How does the surgical team coordinate with my primary clinician for follow-up care?

Conditions commonly treated by this procedure

A tonsillectomy is a surgery to remove the tonsils, which are the two pads of tissue at the back of the throat. Clinicians often recommend this procedure for individuals who experience frequent or long-lasting infections, known as tonsillitis. This may include cases where infections happen many times in a single year or do not respond well to antibiotics.

Another common reason for the procedure is sleep-disordered breathing. This can include obstructive sleep apnea, a condition where the airway becomes partially or fully blocked during sleep. This is often caused by enlarged tonsils, also called tonsillar hypertrophy, which can make it difficult to breathe comfortably at night.

Your clinician may also suggest a tonsillectomy to treat other issues, such as:

• Peritonsillar abscess: An infection that causes a collection of pus to form near the tonsils.
• Tonsil stones: Small, hard, and sometimes painful deposits that form in the crevices of the tonsils.
• Suspected growths: In rare cases, the procedure is used to examine or remove tissue that may be cancerous.

Related symptoms people search for

Many people look into this procedure because they are dealing with uncomfortable or disruptive symptoms. While these symptoms can be caused by various issues, they are often associated with the conditions treated by a tonsillectomy. Common symptoms may include:

• Frequent or severe sore throats that return often.
• Loud snoring, gasping, or pauses in breathing during sleep.
• Difficulty swallowing food or feeling like something is stuck in the throat.
• Persistent bad breath that is not helped by regular dental care.
• Swollen or tender lymph nodes in the neck.

If you notice these symptoms, it is best to consult with a healthcare professional. They can evaluate your health history and help you decide if a tonsillectomy or another treatment is the right path forward for you.

Evidence overview

Tonsillectomy is a common and well-studied surgical procedure. Medical evidence primarily supports its use for treating two main conditions: recurring throat infections (tonsillitis) and sleep-disordered breathing, such as sleep apnea.

Clinicians use established guidelines to determine if surgery is the best option. For infections, doctors often review how frequently a patient gets sick over the course of one to three years. For sleep issues, evidence suggests that removing enlarged tonsils can help open the airway, which may improve breathing patterns and overall sleep quality.

Safety notes and individualized care

While tonsillectomy is generally considered safe, it is a surgery that involves anesthesia and carries certain risks. Your care team will review your medical history, including any bleeding disorders or previous reactions to anesthesia, to tailor the procedure to your specific needs.

Potential risks and safety considerations include:

• Bleeding: Small amounts of bleeding can happen during the procedure or during the recovery period, especially when scabs fall off the healing tissue.
• Infection: Although care is taken to maintain a clean environment, infection at the surgical site is possible.
• Pain and Dehydration: Recovery often involves a sore throat and pain when swallowing. This can make it difficult to drink enough fluids, leading to a risk of dehydration.

Your clinician will provide a recovery plan that includes strategies for managing pain and staying hydrated to support healing.

Sources used

The content in this section is based on clinical summaries and patient education materials from reputable academic medical centers and national medical libraries.