Erythromycin ointment has antibacterial and anti-inflammatory properties, and does not by itself reduce swelling. Erythromycin is produced by streptococcus and is a macrolide antibiotic. Erythromycin can pass through the cell membrane of bacteria, so that bacterial protein synthesis is inhibited, can play an antibacterial role, topical erythromycin drugs, can be used for the treatment of sensitive bacterial infections. Erythromycin ointment, a common topical anti-inflammatory drug in life, has an anti-inflammatory effect and can be used for small burns, impetigo and other purulent skin diseases. It can also be used for localized infections caused by folliculitis and onychomycosis. Erythromycin ointment can promote the inflammation to subside when applied topically. If the inflammation causes tissue swelling, the swelling may be relieved after the inflammation is controlled. However, erythromycin ointment is generally not recommended for treatment of simple skin swelling. For example, renal swelling, hepatogenic swelling, cardiogenic swelling, and swelling caused by endocrine diseases. It is necessary to go to the hospital for examination to clarify the cause of swelling and treat for the primary disease.