An adenoidectomy is the surgical removal of the adenoids, small pads of immune tissue that sit behind the nose where the nasal passages meet the throat. It’s one of the most common childhood surgeries, typically performed on children under 12 when enlarged or chronically infected adenoids cause breathing problems, recurring ear infections, or persistent sinus issues. The procedure is done under general anesthesia, takes roughly 20 to 30 minutes, and most children recover within one to two weeks.
What Adenoids Do and Why They’re Removed
Adenoids are part of the immune system. They help trap bacteria and viruses that enter through the nose, playing a supporting role in fighting off infections during early childhood. In most people, adenoids shrink naturally by the teenage years and are virtually gone in adults.
The problem arises when adenoids become chronically swollen or infected. Because they sit right at the back of the nasal airway, enlarged adenoids can block normal breathing through the nose, interfere with how the ears drain, and harbor bacteria that cause repeated infections. When these problems don’t respond to other treatments, removing the adenoids often resolves them.
Common Reasons for the Surgery
The most frequent reasons children need an adenoidectomy fall into a few categories:
- Sleep-disordered breathing or obstructive sleep apnea. Enlarged adenoids can partially or fully block the airway during sleep, causing snoring, mouth breathing, restless sleep, or pauses in breathing. For children under 7 who are not overweight and have moderately severe sleep apnea with small tonsils, adenoidectomy alone produces outcomes comparable to removing both adenoids and tonsils together.
- Recurring ear infections. Three ear infections in six months, or four in a year, is a common threshold. Swollen adenoids can block the tubes that drain the middle ear, trapping fluid and creating a breeding ground for infection. For children 4 and older with persistent fluid behind the eardrums lasting more than three months, adenoidectomy is often recommended alongside or after ear tube placement.
- Chronic sinus infections. Adenoidectomy is over 80% effective as a first-line surgical option for children up to 12 with chronic sinus infections that haven’t improved with medication.
- Nasal obstruction lasting three months or more. Persistent blockage that disrupts sleep, causes a nasal-sounding voice, or leads to chronic mouth breathing can warrant surgery.
- Dental or facial growth concerns. Long-term mouth breathing from blocked nasal passages can affect how the jaw and teeth develop, sometimes flagged by a dentist or orthodontist.
Current guidelines generally do not recommend adenoidectomy for ear problems alone in children under 4, unless there’s also nasal obstruction or chronic adenoid infection.
What Happens During the Procedure
Adenoidectomy is performed under general anesthesia, meaning your child will be fully asleep. A breathing tube is placed to keep the airway secure throughout the operation. The surgeon works through the mouth, so there are no external incisions or visible scars.
Several techniques exist for removing the tissue. Some surgeons use a curette, a spoon-shaped instrument that scrapes the adenoid tissue away. Others use a powered rotary shaving device that precisely removes tissue in small increments. A third option uses controlled radiofrequency energy to dissolve the tissue and seal blood vessels simultaneously, which can reduce bleeding during the operation. The choice of technique depends on the surgeon’s preference and the specifics of your child’s case, but outcomes are generally similar across methods.
Preparing Your Child for Surgery
Your child will need to stop eating and drinking before the procedure to ensure an empty stomach during anesthesia. Current guidelines allow clear fluids up to one hour before surgery, breast milk up to four hours before, and solid food up to six hours before (eight hours for fatty meals). The surgical team will give you a specific cutoff time based on when the procedure is scheduled.
You’ll typically be asked to stop giving your child any blood-thinning medications, including ibuprofen, in the days leading up to surgery. The pre-operative appointment is a good time to mention any history of bleeding problems in your family or any reactions to anesthesia.
Recovery Week by Week
Most children recover within one to two weeks. Pain is usually worst on the first day and improves noticeably within the first two days. A low-grade fever on the first day or two after surgery is normal, but a fever that appears three or more days later should prompt a call to your child’s doctor. Some vomiting or nausea in the first 24 hours is common and typically related to the anesthesia.
Plan for at least a week out of school. Your child may sound congested or have bad breath for several days as the surgical site heals. Snoring can actually get temporarily worse before it improves, since swelling in the area takes time to subside.
Eating and Drinking After Surgery
Staying hydrated is the single most important part of recovery. Encourage your child to drink water, non-acidic juices, and broth as soon as they feel up to it. There are no strict dietary restrictions after the procedure. Soft, easy-to-swallow foods like applesauce, yogurt, mashed potatoes, plain pasta, macaroni and cheese, pudding, and smoothies tend to feel best in the first few days. Cold foods like popsicles and ice cream can be soothing. If something doesn’t hurt to eat, it’s fine to eat. The old advice about strictly avoiding crunchy foods hasn’t been shown to cause problems with healing, though most kids prefer softer options while their throat is tender.
Risks and Complications
Adenoidectomy is considered a low-risk procedure. A large population-based study found that complications of any kind occurred in about 2.6% of cases.
Bleeding is the primary concern. About 2.1% of children experience some postoperative bleeding, split roughly evenly between bleeding that happens within hours of surgery and bleeding that occurs days later as scabs in the surgical area come loose. About half of those bleeding episodes, roughly 1% of all surgeries, require a return to the operating room to stop the bleeding. When adenoidectomy is performed on its own (without tonsil removal), the rate of bleeding needing re-operation drops to 0.7%. Wound infection occurs in about 1% of cases.
A rare but notable risk is a change in voice quality, specifically a hypernasal sound when speaking. This happens if the soft palate can no longer fully close off the nasal passage during speech, a function the adenoid tissue helped with. It’s uncommon and, when it does occur, often temporary.
How It Affects the Immune System
Parents often worry that removing immune tissue will leave their child more vulnerable to infections. Research is largely reassuring on this point. Studies measuring antibody levels after surgery have found that any dip in immune markers is small and temporary, returning to normal within about three months. Some research has noted a slightly higher rate of certain bacteria colonizing the back of the throat in the first year after surgery, particularly in children under 4, but this effect fades over time.
One large cohort study did find a modest association between adenoidectomy and a slightly higher long-term risk of upper respiratory infections and certain inflammatory conditions. However, these findings need context: children who need adenoidectomy already tend to have more infections and airway problems than average, making it difficult to separate the effect of the surgery from the underlying condition. For most children, the functional benefits of improved breathing and fewer ear infections far outweigh any subtle shifts in immune function.
How Effective the Surgery Is
For sleep apnea specifically, adenoidectomy alone resolves symptoms in roughly 82% of cases. In children with milder sleep apnea and smaller tonsils, this success rate is comparable to removing both adenoids and tonsils. Children with more severe sleep apnea or significantly enlarged tonsils do better with the combined procedure, where failure rates drop from about 19% to 8%.
For chronic sinus infections in children up to 12, adenoidectomy is effective more than 80% of the time as a first surgical step, often eliminating the need for more extensive sinus surgery. For ear-related problems, the procedure helps by restoring normal drainage from the middle ear, reducing both the frequency of infections and the buildup of fluid behind the eardrum.