Oral herpes, also known as oral mucous membrane rash, is a disease caused by enterovirus, often occurring in infants and young children, the main symptoms include oral symptoms, and accompanying symptoms related to the infection of the virus. 1. Oral symptoms: small herpes appear in the gums, buccal mucosa, palate, tongue and pharynx of the mouth, and ulcers can be formed after bursting, which are covered with yellow secretion and surrounded by a ring of redness. 2. Accompanying symptoms (1) In case of oral herpes simplex virus infection, it may be accompanied by fever, pain, malaise, irritability and refusal to eat. (2) In the case of oral herpes zoster virus infection, it may be accompanied by local pain, burning sensation, itching and other manifestations. (3) Hand, foot and mouth virus infection can be accompanied by fever, and herpes, macules and other lesions on the palms of the hands and soles of the feet. It is recommended that people with the corresponding symptoms consult a doctor in time, and actively treat the disease after a clear diagnosis.