Herpes simplex virus viruses are classified as type 1 and type 2. According to epidemiological surveys, 99% of type 1 occurs mainly in the mouth, throat, nose, eyes and skin, i.e. herpes simplex. HSV-2 is mainly latent in the sacrococcygeal ganglion and can be activated later by fever, cold, nerve trauma, mechanical stimulation, food, drugs and other stimulating factors, which can cause the latent virus to reach the mucosal surface of the skin via the peripheral nerves and cause Recurrent herpes. The primary infection of herpes simplex virus has the highest susceptibility in infants and children from 6 months to 3 years of age, and about 70% to 90% of people have antibodies to HSV-1 by adulthood. antibodies to HSV-2 gradually increase with sexual maturity. Neutralizing antibodies (IgM, IgG, IgA) appear in the blood about 1 week after the primary infection. Severe primary infections or frequent recurrent infections have increased antibody levels. These antibodies do not prevent recurrent infections (reinfection) or the recurrence of latent virus, but they can reduce the severity of the disease. With primary genital herpes, the incubation period is 2-7 days usually 3-5 days. The affected area first has a burning sensation and the primary damage is one or more small, itchy red papules that rapidly turn into small blisters, and after 3-5 days, the blisters vanish or ulcerate and crust over with pain. Usually primary genital herpes is accompanied by swollen and painful lymph nodes that disappear slowly only after 1-2 months. In recurrent genital herpes, within 1 year of the first infection, half of the patients have a recurrence. If infected during pregnancy, it can also infect the fetus, causing premature birth, stillbirth and fetal transmission. The virus has been associated with the development of cervical cancer, which increases the incidence of cervical cancer fivefold. Therefore, herpes simplex virus is very annoying and once infected, it is very difficult to get rid of completely, and will recur whenever the immunity is low. For people with frequent recurrences, you can use anti-viral chronic suppressive therapy for 6-12 months, together with immunity-boosting drugs, and herbal medicine is expected to bring it under control. In addition, strengthening exercise and improving immunity is the best way to reduce recurrence.