The causes of the pain in the stomach, lumbar pain and swelling mainly include the following aspects: first, consider the recent irregular diet, eating more spicy stimulating cold food, etc., resulting in the body intestinal digestive absorption disorder, and then caused by intestinal colic. Secondly, it is considered to be caused by urinary system diseases, mainly including urinary stones and urinary inflammation, urinary stones can cause back pain and swelling, with small stomach pain, etc., which can be clarified by performing urinary ultrasound and routine urine examination. Thirdly, women should also consider gynecological diseases, including gynecological inflammation and uterine fibroids, which can also cause pain in the stomach. The fourth aspect is that the pain is caused by strain and strain on the abdominal muscles and soft tissues, and the pain is caused by pain and swelling of the lower back.