Breast swelling before menstruation is not ovulation. Ovulation is usually about 14 days before the next menstrual period, some patients will appear lower abdominal distension, a small amount of vaginal bleeding or breast swelling and pain and other discomforts, usually about 3 days the symptoms can gradually disappear, so the premenstrual breast swelling and pain is not ovulation, and more considerations with premenstrual syndrome or breast hyperplasia and other breast disorders related. For women with breast pain before menstruation, they should pay attention to keep their mood happy, wear loose underwear, and eat less spicy, stimulating and greasy food. If there is nipple overflow or localized bulging at the same time, it is recommended that the patient go to the hospital as soon as possible to improve the ultrasound, molybdenum target and other related examinations, and then actively treat the cause of the disease under the guidance of the doctor.