Pregnant women with scabs on their nipples may have acute mastitis, or it may be due to wounds or endocrine system disorders. 1. Acute mastitis: During pregnancy, the hormone levels in the body will obviously change, the body is in a weaker state, it is easier to be infected by external bacteria. When bacteria infect the nipple of a pregnant woman, it will lead to an inflammatory reaction in the nipple, the vascular permeability increases, the inflammatory substances seep out and accumulate on the skin surface of the nipple, and if it lasts for a long time, it will form a crust. 2. Wounds: When the newborn sucks the nipple, it may cause the nipple to crack, which is manifested as a scab on the nipple. 3. Endocrine system disorders: During pregnancy, the hormone level in the body will change greatly, leading to the discharging of metabolic substances in the body. Some foreign substances may accumulate on the surface of the nipple, leading to the occurrence of scabs on the nipples of pregnant women. Pregnant women with nipple scabs may also be caused by nipple overflow condensation, etc. It is recommended to closely observe their own situation, abnormalities, timely medical attention to confirm the cause, and follow the doctor’s instructions for symptomatic intervention.