More frequent urination and pain in the abdomen may be due to prostatitis, cystitis, urethritis, and pelvic inflammatory disease. 1. Prostatitis: The cause of prostatitis is related to pathogen infection, irregular sex, sedentary lifestyle, alcoholism, and improper diet. Patients may experience frequent urination, burning pain in the urethra, pain and discomfort in the pelvic region, which may be manifested by frequent urination and pain in the lower abdomen. 2. Cystitis: Cystitis may be caused by bacterial infection, drugs, unclean sex, poor hygiene and other factors. Patients may have frequent urination, urinary urgency, lower abdominal pain and other symptoms, some patients may be accompanied by hematuria, pus urine. 3. Urethritis: The causes of urethritis include gonococcus, chlamydia trachomatis and other infections. Symptoms are frequent urination, increased urethral discharge, which may be accompanied by abdominal discomfort, pain during sexual intercourse, fever and other symptoms. 4. Other: excessive urination and pain in the abdomen may also be caused by pelvic inflammatory disease, indigestion, uterine fibroids and other diseases. There are many reasons that lead patients to have excessive urination and pain in the abdomen, and it is recommended that patients identify the cause of the disease in time and take relevant treatment measures for the cause of the disease.