The main reasons for painful symptoms when urinating after sex are: 1. The action during sex is too intense, and the friction stimulates the urethral orifice and causes damage to the urethral orifice, resulting in local painful symptoms during urination; 2. The urine in the bladder is not emptied before sex, and the bladder area is stimulated during sex, causing the bladder and urethra to become congested and edematous, resulting in painful sensations when urinating after sex. When this symptom occurs, patients should pay attention to drinking more water and urinating more often to play the role of flushing and cleaning the urethra. If the symptoms are more serious, appropriate anti-inflammatory drugs should be considered for treatment, do not have sex again for a short time, eat a light diet and avoid spicy and stimulating foods.