If there is a fever in the small of the stomach, it can be due to a variety of causes. The condition may be caused by enteritis, such as an unclean diet, or in severe cases, diarrhea, which can be treated with oral anti-infective medications, such as pyridoxine. It may also be caused by urinary tract infections, such as urethritis or cystitis, which can be clarified by urinary ultrasound and other examinations of the urinary tract, and these conditions can be improved by conservative treatment with drugs, usually cephalosporin antibiotics or quinolone antibiotics. In addition to active anti-infection treatment, you also need to pay attention to good habits, do not sit still and hold urine.