Erythromycin ointment has the following main roles: a. Skin infections: as an antibiotic ointment, erythromycin ointment is first used to treat and prevent skin infections. Erythromycin ointment can be used for abscesses and other suppurative skin diseases and ulcer surface infections, it can also be used for skin-mucosal junction parts, such as perioral and perianal infections. Usage is usually 2 times a day, thinly applied to the affected area. In addition to anti-infection, erythromycin ointment has some other uses.　　Second, minor trauma: such as minor body contusions, scratches or other traumas can be used erythromycin ointment, the general use of the affected area will be cleaned and disinfected, and then the appropriate amount of ointment coated in the affected area, 2 times a day.　　Third, mild burns: small area of burns, scalds can first use cold water to rinse the wound, and then on the surface of a thin layer of erythromycin ointment.　　Mosquito bites: mosquito bites are more serious, should be timely cleaned and disinfected by the bite of the local, take the appropriate amount of this ointment coated, 2 times a day, for 5-7 days.　　Fifth, nosebleed: dry weather will make some people originally dry nasal mucosa more fragile, so the phenomenon of nosebleed occurs from time to time. At this time, it may be appropriate to use erythromycin ointment coated nasal septum area, 4-5 times a day, you can disinfect, soften the nasal cavity, moisturize the nasal mucosa, improve the internal environment of the nasal cavity, to prevent bleeding again. Do not apply too much, in order to prevent the ointment backflow into the mouth.　　Sixth, keratitis: keratitis is mostly caused by infections, and is common in preschool children. Bacterial keratitis can apply a small amount of erythromycin ointment and take vitamin B2 at the same time. It should be noted that, although erythromycin ointment is widely used, it does not work on skin diseases caused by fungal infections such as tinea capitis, tinea cruris, tinea cruris, tinea cruris, and tinea pedis. Erythromycin ointment can occasionally cause adverse reactions such as localized burning sensation, dryness, itching, erythema, and occasionally hives-like reactions. If an adverse reaction occurs during use, discontinue use immediately and consult your physician promptly.　I hope my answer can help you, Tianjin Jinhao Hospital wishes you good health.