Peritonsillar abscess is the most common deep infection of the head and neck, occurring primarily in young adults. Diagnosis is usually made on the basis of clinical presentation and examination.

How do you rule out a peritonsillar abscess?

A doctor will examine the mouth and throat to diagnose a peritonsillar abscess. They can usually identify this condition with a visual inspection. To aid in the examination, the doctor will likely use a small light and a tongue depressor. Swelling and redness on one tonsil may suggest an abscess.

Why is peritonsillar abscess common in adults?

Causes of a Peritonsillar Abscess

A peritonsillar abscess is most often a complication of tonsillitis. The bacteria involved are similar to those that cause strep throat. Streptococcal bacteria most commonly cause an infection in the soft tissue around the tonsils (usually just on one side).