Frequent tonsillitis may be due to infection, low immunity, etc. If frequent mouth ulcers are present, they may be due to hereditary, traumatic, and stressful factors. When immunity is low, it is possible for both diseases to appear at the same time. 1. Tonsillitis: the formation of tonsillitis is related to a variety of factors, including infectious factors, such as bacterial infection, viral infection, parasitic infection. Or when the patient’s systemic or local immunity is low, pathogens invade the body or the original pathogens reproduce in large quantities may induce tonsillitis. Or it may be caused by acute inflammation of neighboring organs, such as acute pharyngitis, rhinitis. 2. Oral ulcers: the pathogenesis and cause of oral ulcers is not yet clear, may be due to a variety of factors. Mouth ulcers and genetics have a close link, or may be the patient’s immunity is vulnerable to pathogen attack. When the patient’s mental stress, the body vitamins and other nutrient deficiencies, or physical trauma, may lead to mouth ulcers. If the patient often tonsillitis, mouth ulcers, can go to the regular hospital, to identify the cause.