Erythromycin ointment does not have the ability to lighten skin spots; this medication is mainly used for conditions such as impetigo and burns. The main ingredients of erythromycin ointment include erythromycin, benzalkonium bromide, liquid paraffin, yellow petroleum jelly and so on. In the clinic, it is mainly used for septic skin diseases such as impetigo, common acne and small burns, ulcer surface infection. It has no efficacy in lightening skin spots. Adverse reactions to erythromycin ointment are irritation and allergic reactions in some patients. Erythromycin ointment precautions are to avoid contact with the eyes and other mucous membrane tissues; after the use of local itching, redness, swelling, burning pain and other symptoms, you should stop the drug in time, consult a doctor; for the drug allergic to people who are prohibited from this drug, allergic to the patient, be careful to use this drug; pregnant women, lactating women should be under the guidance of the doctor to carry out the application. If you need to apply this drug, it is recommended that patients under the guidance of a doctor to standardize the use.