Pressing pain in the left lower abdomen may be caused by trauma, digestive system diseases, urinary system diseases, gynecological diseases and so on. 1. Trauma: If the patient has a history of trauma to the left lower abdomen, the phenomenon of pressing pain in the left lower abdomen will occur, and the patient needs to check the abdominal skin tissue and ask whether there is a history of trauma, if so, it is necessary to do the appropriate treatment under the guidance of the doctor. 2. Digestive system diseases: If there are colon lesions such as colitis, colon tumor, small intestine lesions such as intestinal tuberculosis, Crohn’s disease, etc., which may lead to pain in the left lower abdomen, it is necessary to do a gastrointestinal imaging or lower abdominal CT examination to clarify the cause. 3. Urological diseases: when the patient has left urinary tract infections, stones, tumors and other diseases, due to the compression of the nerves lead to pressure pain in the left lower abdomen, in the physical examination of the renal region can appear percussion pain. 4. Gynecological diseases: if the woman’s left ovary, adnexa, fallopian tube and other inflammation, cysts, can cause stimulation of the peripheral nerves, the left lower abdominal pain, abdominal ultrasound examination is needed. Symptoms of pain in the left lower abdomen, you need to go to the regular hospital in time, under the guidance of the doctor to do the relevant examination, in order to clarify the cause of treatment.