Pregnancy nipple pain may be caused by the following reasons: 1, the pregnant woman’s body will change in early pregnancy, because the body of progesterone, estrogen increased, the pregnant woman’s breasts will appear swelling and nipple pain phenomenon, belongs to the normal physiological phenomenon, generally do not need special treatment, pregnant women can relieve the pain by hot compress nipple local, into the middle of pregnancy the phenomenon will gradually disappear; 2, if the pregnant woman in the middle of pregnancy or nipple pain, and after the hot compress can not be relieved, may be the result of breast enlargement, pregnant women should promptly go to the hospital to avoid affecting the normal pregnancy and delivery. Pregnant women with sore nipples and swollen breasts should avoid touching the nipples and wear loose underwear to avoid stimulating the breasts and aggravating the pain.