Tonsillitis is inflammation (swelling) of the tonsils.
The tonsils are lymph nodes in the back of the mouth and top of the throat. They help to filter out bacteria and other germs to prevent infection in the body.
A bacterial or viral infection can cause tonsillitis. Strep throat is a common cause.
The infection may also be seen in other parts of the throat. One such infection is called pharyngitis.
Tonsillitis is very common in children.
Common symptoms may be:
Other problems or symptoms that may occur are:
Exams and Tests
Your health care provider will look in the mouth and throat.
A rapid strep test can be done in most doctors' offices. However, this test may be normal, and you can still have strep. Your provider may send the throat swab to a laboratory for a strep culture. Test results can take a few days.
Swollen tonsils that are not painful or do not cause other problems do not need to be treated. Your provider may not give you antibiotics. You may be asked to come back for a checkup later.
If tests show you do have strep, your doctor will give you antibiotics. It is important to finish all of your antibiotics as directed, even if you feel better. If you do not take them all, the infection can return.
The following tips may help your throat feel better:
Some people who have repeated infections may need surgery to remove the tonsils (tonsillectomy).
Tonsillitis symptoms due to strep will often get better within 2 or 3 days after you start the antibiotics.
Children with strep throat should be kept home from school or day care until they have been on antibiotics for 24 hours. This helps reduce the spread of illness.
Complications from strep throat may be severe. They may include:
When to Contact a Medical Professional
Call your health care provider if there is:
Shulman ST, Bisno AL, Clegg HW, et al. Clinical practice guideline for the diagnosis and management of group A streptococcal pharyngitis: 2012 update by the Infectious Diseases Society of America. Clin Infect Dis. 2012;55(10):e86-e102. PMID: 23091044. www.ncbi.nlm.nih.gov/pubmed/23091044
van Driel ML, De Sutter AIM, Keber N, Habraken H, Christiaens T. Different antibiotic treatments for group A streptococcal pharyngitis. Cochrane Database Syst Rev. 2013;4:CD004406. DOI: 10.1002/14651858.CD004406.pub3. PMID: 23633318. www.ncbi.nlm.nih.gov/pubmed/23633318
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: 11/20/2014
Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.
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