Erythromycin belongs to the macrolide class of antibiotics, which inhibits protein synthesis and thus achieves rapid bacterial inhibition. Its special contribution is its antibacterial effect on Chlamydia, Mycoplasma, Legionella, and Helicobacter pylori, so Erythromycin Ointment can be used to treat toxoplasma infections and as an alternative medicine for penicillin allergy. Erythromycin ointment can be used for purulent skin diseases such as impetigo, as well as for small burns and infections of ulcerated surfaces, which can have a burning sensation and local allergy when applied to the skin surface.