Parametrial pain can be caused by changes in hormone levels, excessive milk secretion, breast enlargement, lymphatic duct blockage and other factors. Patients can clarify the cause through hormone level test, ultrasound, mammogram, etc., treat the cause under the guidance of the doctor and insist on close follow-up. 1. Hormone level change: When women are menstruating or pregnant, the hormone level in their body changes significantly, which may stimulate the breast tissue and cause parastatal pain, which is a normal physiological phenomenon. With the end of menstruation and pregnancy, the symptoms will gradually disappear; 2. Excessive lactation: If lactating women produce too much milk, the milk in the parametrium cannot be discharged in time causing stagnation, which can cause pain; 3. Mammary gland hyperplasia: If there is prolonged mental stress, emotional depression, or bad habits such as staying up late, it may cause mammary gland hyperplasia with hard nodes and lumps, which can also lead to pain; 4. Blocked lymphatic ducts: if the lymphatic ducts under the armpit are blocked and inflamed, it may also lead to symptoms of parametrial pain; 5. Breast cancer: if parametrial pain occurs repeatedly and the nodes and lumps have an obvious tendency to increase, be alert to the possibility of cancer.