Pain in the small abdomen when urinating is considered to be caused by urinary stones or urinary tract infection. Inflammation in the urine or inflammation caused by stones can irritate the mucosa and cause pain. 1, urinary stones are more common with kidney stones and ureteral stones. Usually stone impaction will cause pain in the lower back and abdomen. When the stone is located in the lower ureter, bladder or urethra, it can cause pain in the small abdomen. A hospital ultrasound examination of the urinary tract is needed. Strangulated pain is more intense and can be relieved by intramuscular injections of progesterone and scopolamine. 2, most of the urinary tract infections are caused by retrograde infection of bacteria through the urethra, in addition to pain in the small abdomen, accompanied by frequent and urgent urination. A preliminary diagnosis can be made mainly through routine urinalysis. After the diagnosis should be timely application of antibiotic drugs, serious need more than two joint applications, must pay attention to drink more water, eat more vegetables, avoid staying up late. 3, women should also consider gynecological diseases, such as pelvic abscesses, pelvic inflammatory disease. This condition is mostly accompanied by vaginal discharge and pain in the lower back. You need to go to a gynecologist for a detailed examination. For occasional pain in urine when urinating can continue to be observed, if the pain is more serious must go to the hospital for examination and treatment.