Erythromycin ointment includes erythromycin ointment and erythromycin eye ointment. Erythromycin ointment is an antibiotic ointment for topical use on the skin and is commonly used to treat inflammatory treatments of the skin and attached tissues. Erythromycin ophthalmic ointment is commonly used in ophthalmology to treat conjunctivitis. Erythromycin ointment is mainly composed of erythromycin and a base of petroleum jelly, which is a broad-spectrum antibiotic, and petroleum jelly has some lubricating and moisturizing properties. Erythromycin ointment is commonly used in the treatment of inflammatory skin conditions such as folliculitis, sweat inflammation, epidermal trauma inflammation of the skin, and its anti-inflammatory effect is obvious, there is no obvious irritation to the skin, and fewer side effects, so that dermatology is widely used. Erythromycin has antagonistic effect with chloramphenicol and lincomycin and cannot be applied at the same time. The drug is not recommended for use around the eyes and nasal mucosa. Erythromycin ophthalmic ointment is commonly used in ophthalmology for the treatment of conjunctivitis caused by sensitive bacterial infections, among others. Allergic reactions such as eye pain, changes in vision, persistent redness or irritation are occasionally seen after administration. Contraindications are unclear. Erythromycin ointment must be used under the guidance of a doctor, and cannot be purchased and used privately. And if there are redness, swelling, burning and other uncomfortable symptoms after applying erythromycin ointment, it is recommended to stop using it.