Dexamethasone injection belongs to the adrenocorticotropic hormone class of drugs, mainly used for allergic diseases, as well as autoimmune system diseases, also has a strong anti-inflammatory, anti-shock effect. If the patient’s tonsils appear pus, indicating that the inflammation is generally very serious, it is best to actively anti-inflammatory symptomatic treatment. If the patient after the application of antibiotics is not very obvious improvement of symptoms, in this case can consider the application of dexamethasone intramuscular injection, can effectively play the role of anti-inflammatory swelling and fever. It is recommended that the patient is best to use the drug under the guidance of the doctor, to avoid the use of too much dose to cause certain side effects. In addition, life must be more exercise, improve their own immune system, to avoid repeated inflammation of the tonsils pus, as far as possible to ensure a light diet, avoid smoking, drinking.