Herpes is commonly seen in diseases such as herpes simplex, chickenpox, herpes zoster, and hand, foot, and mouth disease. Herpes simplex is a limited cluster of small blisters on the skin and mucous membranes, especially on the lips, nose, cheeks and external genitalia, with mild systemic symptoms, easy to recur, and a duration of 2-3 weeks; chickenpox is mostly seen in children, and is characterized by the simultaneous appearance of papules, blisters and crusts on the skin of the whole body, with a duration of about 10 days; herpes zoster is a herpetic rash that appears in clusters along the peripheral nerves of one side of the body, and is recurrent due to the patient’s immune function. The duration of the disease is variable due to the patient’s low immune function and other factors; hand, foot and mouth disease is characterized by papules and herpes on the hands, feet and mouth, and the duration of the disease is about one week.