Erythromycin ointment is anti-pus. Erythromycin belongs to macrolide antibiotics and is one of the antibiotics commonly used in clinical practice. Erythromycin ointment is a topical anti-inflammatory drug, can be used for skin wounds, such as ulcers, burns and other wounds of anti-inflammatory and pus type skin disease, help to reduce the symptoms rather than aggravate the symptoms, and therefore belongs to the anti-pus. 1, skin wounds: erythromycin ointment is commonly used for the anti-inflammatory of smaller wounds, as long as it is not a large bleeding wounds can play a sterilizing effect, the treatment of wounds that have not suppurated is more effective, after using alcohol or iodophor disinfection. After disinfection with alcohol or iodophor, applying erythromycin ointment can play the role of anti-inflammatory and disinfection, which can speed up the wound healing. If the wound becomes infected with pus, the affected area needs to be treated, saline, hydrogen peroxide or iodophor can be used to flush the wound, and the treatment effect of removing the pus and then applying erythromycin ointment is better; 2. Pustular skin disease: acne on the surface of the skin is one of the common pustular skin diseases, if the surface of the skin acne has become pus, the pus needs to be drained before using erythromycin ointment, this act is recommended to go to the hospital and ask a professional doctor to deal with it. The pus will be discharged, and the pus will be drained. If there is deep pus in the skin, further removal of necrotic tissue is required, and other medications should be replaced for anti-inflammatory treatment. During the medication period, attention should be paid to keeping the wound clean, avoiding water and excessive squeezing of the wound, and eating a light diet without spicy and stimulating foods. Avoid contact with mucous membranes during medication, and if contact is accidental, rinse immediately. If redness, swelling or burning occurs at the site of use, stop medication immediately and seek medical attention.