Urinary tract infection can cause pain in the small abdomen, urinary tract infection when a large number of bacteria in the bladder mucosa colonization, reproduction, and production of toxins, the bladder mucosa under the attack of bacteria damage and cause a series of chronic inflammatory changes in the bladder, appearing small abdominal pain, some patients show pain before urination, some patients show pain in the small abdomen at the end of urination, pain is acidic dull pain. This symptom should drink more water to ensure sufficient urine volume, which can reduce the bacterial toxins on the bladder mucosa, shorten the residence time of bacteria in the bladder, you can use a hot water bag hot compress on the abdomen to relieve the symptoms.