It is not possible to generalize about the need to apply erythromycin ointment after spotting. If there is no localized inflammation after spotting, there is no need to apply erythromycin ointment. However, if there is a localized secondary infection, erythromycin ointment should be applied to address the cause. Erythromycin ointment is a macrolide antibiotic with anti-inflammatory and antiseptic effects, which can be used to treat purulent skin diseases such as impetigo, or ulcer surface infections. In general, most patients after the potion spotting, if there is no physical discomfort symptoms, or local infection, usually do not need to apply erythromycin ointment, keep the local skin clean and clean. If the patient in the potion spotting, local skin redness, swelling, oozing, itching, pain and other symptoms, mostly considered to be secondary infection caused by the need for the cause, under the guidance of the doctor, the external use of erythromycin ointment, so as to control the development of inflammation, alleviate the symptoms of the disease, and improve the prognosis. If necessary, it is also necessary to take oral antibiotics such as roxithromycin and other drugs. Some patients may experience adverse reactions such as skin irritation during the use of erythromycin ointment. Therefore, those who are allergic to erythromycin ointment need to be contraindicated. The medication needs to be used as prescribed by the doctor.