Inflammation of the tonsils, or tonsillitis, is a very common infectious disease of the upper respiratory tract, and the disease can cause fever. Acute tonsillitis or acute attack of chronic tonsillitis can appear different degrees of inflammation of the pharyngeal mucosa and lymphatic tissues, such as redness and swelling of the local mucosa and tonsils, pharyngeal pain, dysphagia and other symptoms. It can also cause systemic symptoms, which may cause patients to experience chills, headache, high fever, fatigue, loss of appetite and other general discomforts. It is recommended that patients with symptoms of tonsillitis, especially those who have developed fever, must go to the hospital for detailed examination as soon as possible. Moreover, fever symptoms can be caused by a variety of causes, and it is necessary to diagnose the cause of the disease through the examination, and give the correct treatment under the guidance of the doctor to avoid delaying the condition.