Tonsillitis is an infection or inflammation of the tonsils. The tonsils are balls of lymph tissue on both sides of the throat, above and behind the tongue. They are part of the immune system, which helps the body fight infection. Tonsillitis often goes away on its own after 4 to 10 days.

How long does tonsillitis last if untreated?

With viral tonsillitis, antibiotics are ineffective and the episodes usually last from four to six days. If it's the bacterial variety, an untreated bout can last from 10 to 14 days; antibiotics usually clear it up in five to seven days.

What happens if you leave tonsillitis untreated?

If tonsillitis is left untreated, a complication can develop called a peritonsillar abscess. This is an area around the tonsils that's filled with bacteria, and it can cause these symptoms: Severe throat pain. Muffled voice.