If you experience painful urination when you urinate after having sex for the first time, it is often caused by inflammation of the urethra in clinical practice. Since the urethra of women is short and straight, the lack of hygiene and cleaning during sexual intercourse may cause pathogenic bacteria to enter the urethra and cause frequent, urgent, painful urination and even hematuria in the naked eye. It is recommended that if you are not planning to get pregnant, you can take oralloxacin or ciprofloxacin for treatment, and it is also recommended that you drink more water and eat less sour and spicy food and less fried food. Generally, the symptoms will be significantly reduced or disappear after 2-3 days of medication. It is also recommended that women should pay attention to hygiene when having intercourse, for example, both men and women should do external genital cleansing, and it is also recommended that it is best to urinate once after intercourse, so as to avoid the possibility of urinary tract infection.