The time of ovulation can cause sore nipples. This is because when you ovulate, you go through two peaks of estrogen. Too much estrogen may stimulate the blood vessels in the breasts, causing breast edema, which may be painful, especially when touched, it will be more obvious, and will cause nipple pain. When this happens, it usually gets better slowly at the end of ovulation. If the pain is more severe, you can carry out local massage, you can clockwise massage three circles, counterclockwise massage three circles, can improve the situation of nipple pain; you can also carry out hot compresses, hot compresses at a temperature of about 40 degrees, can accelerate blood circulation, reduce nipple pain. At the same time, you should also adjust your mind, do not eat spicy and stimulating food, so as not to stimulate the breast and cause nipple pain occurs.