Most herpes on the lips is a symptom caused by herpes simplex virus infection. It may be spread through direct contact, indirect contact. 1. Direct contact: it can cause cross-infection through kissing, contact, herpes fluid, oral and nasal secretions, etc., which may cause herpes on the lips. 2. Indirect contact: contact with the patient’s skin herpes, or contact with the patient’s contaminated household goods, may also cause cross-infection, resulting in herpes on the lips. Lips long herpes should be timely medical treatment, personal supplies used separately, to reduce cross-infection. Prompt treatment can shorten the course of the disease and reduce complications.