Erythromycin is a topical drug that generally has no effect on the fetus and can be used by pregnant women. However, due to the special nature of pregnant women, care still needs to be taken to avoid long-term, large-area topical application. Erythromycin ointment can be used for impetigo, small burns, ulcerated surface infections and common acne. Pregnant women are a special group of people who cannot use random medications, including oral medications or topical medications, during the pregnancy stage. Therefore, pregnant women must go to the hospital in time to treat their health conditions and use drugs that do not affect the fetus under the guidance of a doctor to help their bodies recover. Pregnant women using erythromycin should pay attention to avoid contact with eyes and mucous membranes of the mouth and nose, and should stop using the drug if there is burning sensation, itching, redness and swelling in the area where it is used, and wash the local drug away, and seek medical attention if necessary. The use of erythromycin is prohibited for those who are allergic to erythromycin, and the use of erythromycin is prohibited for those who are allergic. Pregnant women usually pay attention to supplemental nutrition, ensure sleep, moderate exercise, relieve stress, enhance resistance, avoid pregnancy infection affect health.