Herpes simplex is an infection caused by the human herpes simplex virus, which mostly invades the mucous membranes of the skin. Clinically, herpes simplex can be divided into type 1 and type 2. type 1 is mostly found on the face, while type 2 is mostly found in the genital area and below the waist, although there are exceptions. The main symptoms are early local itching, followed by erythema, followed by dense, clusters of small, rice-sized papules or blisters on top of the erythema. 1-2 weeks later, the blisters can dry and crust over, usually without scarring, but post-inflammatory pigmentation can remain. The treatment is mainly topical, topical phthalide ointment, acyclovir ointment, etc., secondary infection can be used antibiotic ointment such as gentamycin or mupirocin ointment, systemic treatment can be used nucleoside antiviral drugs such as acyclovir, famciclovir, etc., the course of treatment is about 1 week.