Below the belt position swelling and pain, can be considered with urinary system diseases, digestive system diseases, etc., women may also be reproductive system diseases, should be considered comprehensively. 1. Urinary system diseases: such as urinary tract infection, if caused by cystitis, can lead to urinary tract irritation signs, namely urinary frequency, urinary urgency, urinary pain, at the same time can cause suprapubic pain. 2. Diseases of the digestive system: If intestinal tuberculosis occurs, low-grade fever, night sweating (sweating abnormally after going to sleep, and sweating stops after waking up), emaciation and other symptoms can occur, and right lower abdominal pain can also occur. 3. Diseases of the female reproductive system: If there is preeclampsia, a small amount of vaginal bleeding or paroxysmal lower abdominal pain with a feeling of falling may occur. When there is pelvic inflammation such as acute endometritis, the endometrium can be congested, edema, inflammatory exudate, causing lower abdominal distension and pain, vaginal secretion increase and other manifestations. Lower abdominal pain, it is recommended to promptly go to the hospital specialist, the cause of the symptomatic treatment.