Vaginal pain when urinating may be due to urinary tract infection, urinary stones, urethral polyps, vaginitis and other reasons. 1. Urinary system infection: If the patient has an acute infection of the urinary system, it will cause the symptoms of vaginal pain when urinating, accompanied by urinary urgency, urinary frequency, etc., and some patients will also have fever symptoms, such as urethritis, ureteritis. 2. Urinary stones: when the patient has lower urinary tract stones, such as urethral stones, can also cause symptoms of vaginal pain when urinating. This disease usually causes the patient to have symptoms such as hematuria, difficulty in urination, and pain in urination. 3. Urethral polyps: urethral polyps can cause burning pain in the urethra, usually this symptom will be significantly worse after activity, sexual intercourse or urination, and sometimes there will be frequent urination, urinary bifurcation and other symptoms. 4. Vaginitis: vaginitis is a relatively common gynecological diseases, this disease will cause women vaginal itching, abnormal leukorrhea discharge odor, and sometimes also cause pain during sexual intercourse or vaginal pain in urination.