Chronic tonsillitis, a commonly-seen disease in clinic, is the chronic inflammation of the palatal tonsil. It may occur in all people and is commonly-seen in children, less commonly-seen in young people and least commonly-seen in old people, without marked difference in sexes. Due to repeated onset of acute tonsillitis, body resistance against diseases will decline, or because of obstructed drainage of crypts, bacteria and viruses will reproduce inside crypts, developing into chronic inflammation. This is the way most chronic tonsillitis occurs. Besides, Secondary chronic tonsillitis may also occur after the patient suffers from infectious diseases like scarlet fever, diphtheria, influenza and measles.