There is no woman in the middle of the abdomen under the hidden pain to be alert to the four diseases such as this statement, because there are many causes of abdominal pain in women, such as uterine adenomyosis, endometriosis, chronic pelvic inflammatory disease, pelvic tumors, physiological period of pain, and other diseases of the unity. 1. Endometriosis: the most common lesions are ovary and uterosacral ligament, the pain is characterized by lower abdomen and lumbosacral distension and pain that starts 1~2 days before menstruation, and the symptoms are aggravated on the 1st~2nd day of menstruation, and the pain is gradually relieved after menstruation, and the pain may cause infertility in serious cases. 2. Chronic pelvic inflammatory disease: this is a very common disease, patients will have persistent pain in the middle of the lower abdomen and abnormal leukorrhea, sometimes accompanied by perineal itching symptoms, early symptomatic treatment has a better prognosis. 3. Pelvic tumor: this disease will cause hidden pain in the lower abdomen, and sometimes obvious lumps can be touched, if the tumor metastases can also cause vesico-rectal compression symptoms, manifested as poor urination, constipation, frequent urination and so on. 4. Physiological pain: women may have hidden pain in the lower abdomen during menstruation and before menstruation, which is a normal physiological pain, and during menstruation, they should pay attention to more rest, reasonable diet and proper exercise. 5. Other diseases: such as inflammation of the urinary system, stones and acute and chronic inflammation of the intestinal tract may cause pain in the middle and lower part of the lower abdomen, and should be consulted in time to rule out abnormalities. The woman in the middle of the abdomen under the hidden pain causes more recommended timely medical treatment, follow the doctor’s instructions standardized treatment.