Chest pain and small abdominal pain can be seen in muscle strain after strenuous exercise, or due to changes in hormone levels before the onset of menstruation in gynecology, and may also be related to certain diseases, which can be examined at the hospital to determine the cause after comprehensive symptom performance and examination results, and treat the cause. 1, muscle strain: if it is after strenuous exercise or heavy physical labor, without timely massage and relaxation of muscles, lactic acid cannot be metabolized in time, which may cause muscle 2, menstrual flow: the level of estrogen in the body before the menstrual flow is elevated, prompting the development of breast tissue leading to the symptoms of chest distension. In addition, the onset of menstruation makes the body secrete prostaglandins, which can cause small blood vessel spasms in the uterus and pelvic congestion, thus causing symptoms of vague pain in the abdomen or pelvis, which are normal physiological changes during menstruation; 3. Other: abdominal pain may be related to gastrointestinal diseases, which usually cause nausea, diarrhea, abdominal pain and other symptoms, if the ratio of estrogen and progesterone in the body is out of balance at this time. This leads to excessive enlargement of the breast parenchyma, which may cause a feeling of breast swelling and pain, and requires a clear diagnosis through mammography and mammography. In these cases, the cause of the problem should be clearly identified and the appropriate treatment should be taken. Pain caused by strenuous activity or menstrual flow can be effectively relieved by adequate rest, a light diet, and appropriate hot compresses and massage. Patients with mammary gland hyperplasia can be treated with medication or surgery according to the degree of development of the disease to improve symptoms and prevent the occurrence of breast cancer.