Children can apply erythromycin ointment because it can treat many diseases in children, for example, after skin infection, children can use erythromycin ointment to apply topically on the skin, so as to play the role of anti-infection. If children suffer from eye infections, erythromycin ointment can also be applied to anti-infection treatment, there are other diseases can also use erythromycin ointment, such as nasal dryness or nosebleeds, allergic rhinitis, etc., you can apply a small amount of erythromycin ointment in the nasal cavity, so as to alleviate the symptoms of rhinitis, as well as the symptoms of nasal dryness, etc., to sum up, we can see that the children can be applied to erythromycin ointment to treat the disease.