Patients with acne on the face can be treated with erythromycin ointment, and the use of the drug requires medical guidance. Erythromycin ointment has antibacterial and anti-inflammatory effects, which can reduce the redness, pain, itching and swelling of acne due to bacterial infection. Combined with isotretinoin creams such as retinoic acid cream and adapalene gel treatment, it can loosen pores and prevent hair follicle blockage. Patients should wash their face before applying erythromycin ointment, then apply erythromycin ointment, and after half an hour they can be treated with isotretinoin creams. During the medication period, pay attention to facial hygiene to reduce facial oil secretion and prevent hair follicle clogging. Usually, you should eat less sweets, do not eat garlic, chili, pepper and other spicy and stimulating foods, and also pay attention to sun protection and good skin moisturizing.