Frequent urination and stomach pain may be caused by ureteral stones, chronic prostatitis, urinary tract infections and so on. 1. Ureteral stones: If there are metabolic abnormalities, obstruction or foreign bodies and drugs and other factors, the patient will have frequent urination and stomach pain, and some patients are accompanied by increased blood pressure, nausea, vomiting, urinary pain, urinary urgency and other manifestations. 2. Chronic prostatitis: when affected by pathogenic microbial infection, urine stimulation, genetic factors, the prostate gland long-term congestion and other factors, will lead to frequent urination and stomach pain, accompanied by urinary urgency, urinary pain, pain in the lower abdomen, premature ejaculation, erectile dysfunction and other symptoms. 3. Urinary system infection: If the pathogenic bacteria enter the human body through the way of upward infection, bloodstream infection, direct infection and lymphatic tract infection, it will lead to the phenomenon of frequent urination and stomach pain, and there will be urinary urgency, pain in urination, and even naked eye hematuria and other local symptoms. It is recommended that patients go to a regular hospital, under the diagnosis of the doctor, according to the patient’s condition, targeted treatment.