Acyclovir Ointment is primarily effective as an antiviral infection and is mainly used to treat herpes simplex or herpes zoster infections. Acyclovir is a synthetic purine nucleoside analog, which is mainly used for all kinds of infections caused by herpes simplex or herpes zoster virus, and can be used for primary or recurrent skin, mucous membrane, external genital infections and viral infections occurring in immunodeficient persons. Acyclovir ointment is a topical drug, topical medication, it is recommended to follow the doctor’s instructions. Common adverse reactions to acyclovir ointment are mild pain, burning, stinging, itching, and rash after application, and it is contraindicated in patients with known hypersensitivity to acyclovir. Once the signs and symptoms of herpes appear, you should seek medical attention as soon as possible and use the medication appropriately under the guidance of your doctor.