Generally speaking, according to the causes of the redness and swelling of the mouth, different treatment methods can be adopted clinically. First, if the patient accidentally falls during strenuous activities, resulting in soft tissue contusions in the mouth, local redness and swelling, and pain. At this time, it is recommended that ice be applied externally to reduce local exudation and avoid progressive increase of swelling in the patient’s mouth. Two days after the local exudation has stopped, hot towels can be applied wet. Oral medications such as swelling and pain, blood circulation and blood stasis pills can relieve the symptoms of swelling of the mouth faster. Secondly, if the patient has an allergic reaction after eating seafood, mango and other allergy-prone foods, the redness and swelling of the mouth is manifested. At this time, patients need to take oral anti-allergy drugs such as paracetamol and loratadine to relieve the allergic allergic reaction in the body and reduce the redness and swelling of the mouth.