Herpes on the baby’s buttocks is common in the following cases: 1. diaper dermatitis, redness on the buttocks, scattered herpes, there can be a red halo around the herpes, the rash is mainly on the part wrapped in diapers, the local skin needs to be exposed and kept clean, when there are obvious signs of infection can be applied locally anti-infective cream. 2. hand, foot and mouth disease is caused by viral infection, herpes on the hands, feet, buttocks and scattered distribution in the mouth, sometimes accompanied by fever, the baby’s mental state is fine, need to pay attention to monitoring the temperature and can be given antiviral and anti-infective symptomatic treatment. Sometimes it is accompanied by fever, the baby’s mental state is still okay, you need to pay attention to monitor the temperature, you can give antiviral and antipyretic symptomatic treatment, it is best to go to the hospital for diagnosis and give the appropriate treatment.