Breast pain that has stopped for half a month and menstruation has not yet come may be related to conditions such as premenstrual omen, pregnancy, polycystic ovary syndrome, hyperprolactinemia, and other factors. 1. Menstrual precursors: affected by the physiological cycle, before the onset of menstruation, women may experience symptoms such as breast sensitivity, breast pain, lumps in the breasts, and short temper, which are considered to be manifestations of menstrual precursors. 2. Pregnancy: If a woman’s period has been delayed for more than a week and she has recently had sex, she may be pregnant. After pregnancy, due to changes in hormone levels, women will experience symptoms such as cessation of menstruation and breast pain. 3. Polycystic Ovary Syndrome (PCOS): Patients may experience symptoms such as delayed menstruation, scanty menstruation, scanty menstruation, etc. It may also be accompanied by hirsuteness, acne, and other manifestations. 4. Hyperprolactinemia: These patients may have symptoms such as breast swelling and pain, delayed menstruation, and breast milk secretion. 5. Other factors: If the patient has a stressful life in recent times and does not rest well, it may also affect the normal menstrual cycle. In addition, breast hyperplasia, mastitis, breast cancer and other causes may also appear similar clinical manifestations, women should consult a doctor in time to clarify the diagnosis.