Herpes of the mouth, also known as oral herpes, is a common lesion of the oral mucosa and is usually characterized by oral herpes simplex caused by the herpes simplex virus. 1. Oral herpes may be caused by a primary infection, such as the herpes simplex virus; or it may be caused by a recurrent infection, such as a recurrent infection that has developed antibodies in its own body and is caused by mechanical irritation, colds, sunlight exposure, overexertion, and other aspects of the irritation. 2. Patients with oral herpes may experience skin damage such as oral mucosal congestion and edema, oral blisters, or systemic symptoms such as fever and malaise. Patients can take antiviral drugs such as acyclovir, vasiclovir and ribavirin for treatment under doctor’s guidance, or use drugs such as procaine solution, lidocaine gel and compound boric acid solution for local treatment. A small number of patients with mild disease can be cured without special treatment, and patients with obvious symptoms can be cured through active treatment. In life, patients should pay attention to good oral care, keep the mouth clean, pay attention to rest, and try to eat high-energy, easy to digest, nutritious fluid or soft food, etc., and the use of medication needs to be in accordance with the doctor’s instructions.