Tonsillitis is inflammation of the tonsils most commonly caused by a viral or bacterial infection whose symptoms include sore throat and fever. The overwhelming majority of patients recover completely with or without medication. In 40%, symptoms have resolved in three days and within one week in 85%, regardless of whether streptococcal infection (an important cause) is present or not. Common signs and symptoms include: Less common symptoms include: In cases of acute tonsillitis, the surface of the tonsil may be bright red and with visible white areas or streaks of pus. Tonsilloliths occur in up to 10% of the population frequently due to episodes of tonsillitis. The most common cause is viral infection and includes adenovirus, rhinovirus, influenza, coronavirus, and respiratory syncytial virus. It can also be caused by Epstein-Barr virus, herpes simplex virus, cytomegalovirus, or HIV.