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Enlarged adenoids


The adenoids are lymph tissue that sits in your upper airway between your nose and the back of your throat. They are similar to the tonsils.

Enlarged adenoids means this tissue is swollen.

Alternative Names

Adenoids - enlarged


Enlarged adenoids may be normal. They may grow bigger when the baby grows in the womb. The adenoids help the body prevent or fight infections by removing bacteria and germs.

Infections can cause the adenoids to become swollen. The adenoids may stay enlarged even when you are not sick.


Children with enlarged adenoids often breathe through the mouth because the nose is blocked. Mouth breathing occurs mostly at night, but may be present during the day.

Mouth breathing may lead to the following symptoms:

Enlarged adenoids may also cause sleep problems. A child may:

  • Be restless while sleeping
  • Snore a lot
  • Have episodes of not breathing during sleep (sleep apnea)

Children with enlarged adenoids may also have more frequent ear infections.

Exams and Tests

The adenoids cannot be seen by looking in the mouth directly. The health care provider can see them by using a special mirror in the mouth your mouth or by inserting a flexible tube (called an endoscope) placed through the nose.

Tests may include:

  • X-ray of the throat or neck
  • Sleep study


Many people with enlarged adenoids have few or no symptoms and do not need treatment. Adenoids shrink as a child grows older.

The health care provider may prescribe antibiotics or nasal steroid sprays if an infection develops.

Surgery to remove the adenoids (adenoidectomy) may be done if the symptoms are severe or persistent.

When to Contact a Medical Professional

Call your health care provider if your child has trouble breathing through the nose or other symptoms of enlarged adenoids.


Wetmore RF. Tonsils and adenoids. In: Kliegman RM, Behrman RE, Jenson HB, Stanton BF, eds. Nelson Textbook of Pediatrics. 19th ed. Philadelphia, PA: Elsevier Saunders; 2011:chap 375.

Review Date: 11/25/2014
Reviewed By: Ashutosh Kacker, MD, BS, Professor of Clinical Otolaryngology, Weill Cornell Medical College, and Attending Otolaryngologist, New York-Presbyterian Hospital, New York, NY. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.
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