After coitus to relieve urinary pain may be caused by the following reasons: first, coitus without attention to hygiene, because the female urethra is short and straight, once coitus without attention to hygiene, may lead to pathogenic bacteria into the urethra, and cause inflammation of the bladder, inflammation of the urethra, so it will be manifested in the relief of the urinary pain in the stomach and may also be frequent urination, blood in the eyes of the corresponding clinical symptoms. The symptoms may be frequent urination, hematuria and other corresponding clinical symptoms. It is recommended to drink more water and actively give anti-inflammatory treatment, most of the symptoms will soon be relieved; the second, because of holding urine for too long leading to overfilling of the bladder, so in the relief of urinary pain, so it is recommended not to hold urine for too long.