When pregnant, if a pregnant woman has nipple pain, most of it is related to the further enlargement of the breast during pregnancy and to the lack of attention to nipple hygiene. In this case, choose more appropriate underwear, do not wear non-pregnancy underwear with steel rings, but wear looser, comfortable cotton underwear, so as not to affect the blood circulation of the breasts. When cleaning the nipples, it is recommended to use water to rinse, do not use shower gel or soap to clean the breasts, which can easily lead to nipple cracking. Do not over-stimulate the nipples, over-stimulation of the nipples will cause nipple pain, easily irritated to cause uterine contractions, if the uterine contractions are more frequent, will increase the risk of miscarriage.