The pain is caused by hormonal changes in the body during ovulation, which is a normal phenomenon. If you have been in pain after having intercourse during ovulation, it may also be caused by pregnancy, and if you have intercourse during ovulation without contraception, you have a high chance of getting pregnant. The estrogen and progesterone in your body will increase after pregnancy, which will stimulate your breasts and cause pain, and also cause breast congestion and edema. If the nipple pain is severe, it may be caused by local inflammation and stimulation, or it may be caused by breast enlargement. If the local inflammation will cause local redness, cracking, etc., can be treated with external erythromycin, if suspected of breast hyperplasia caused by B ultrasound examination, identified under the guidance of the doctor to use breast dissipation capsule treatment, can be local hot compresses, to keep a relaxed mood, do not stay up late, to avoid endocrine disorders aggravate breast hyperplasia.