Abdominal and lumbar pain may be related to overexertion, as well as conditions such as urinary tract infections, urinary tract stones, and liver diseases. 1. Physiological factors such as strenuous exercise, overwork and lack of rest may lead to muscle tension and other phenomena such as overstretching of muscles, ligaments and other tissues in the abdomen and waist, resulting in pain in the abdomen and waist. 2. Urinary tract infection: pyelonephritis, ureteritis, cystitis and other infectious diseases, the local inflammatory reaction leads to tissue edema and bleeding, and the kidney, ureter and bladder and other tissues are located in the pelvic and abdominal cavities, so abdominal and lumbar pain will occur. 3. Urinary stones: kidney stones, ureteral stones, etc. lead to urinary tract obstruction, obstruction above the site of tissue compression caused by pain, in addition to stone stimulation of the surrounding mucous membranes leading to abdominal and lumbar pain. 4. Liver disease: liver cancer, fatty liver, hepatitis and other diseases, due to the insensitivity of the liver to pain, the surrounding tissue nerve stimulation produces tugging pain, so abdominal and lumbar pain. In addition, peritonitis, intestinal tuberculosis, inflammatory bowel disease, colon cancer and so on may cause abdominal and lumbar pain, which needs detailed professional examination.