The hymen may be torn during the first sexual intercourse. After the hymen is torn, there will be bleeding first, which may be accompanied by a certain amount of vulvar redness and swelling, and such pain may last for about 3 days. If there is still bleeding for more than 3 days and there is also vulvar pain, you need to go to the hospital to register for a gynecological examination to see the condition of the vulva. Because sometimes bacterial infection may also cause pain for a longer time and redness and swelling for a longer time. In such cases, it is advisable to go to a pharmacy and buy a lotion, such as gynecological cleanser or cleansing lotion, as long as it is a special gynecological cleansing, disinfection and sterilization lotion, and take a 15-minute sitz bath in a 1:10 water basin or wash your vulva, and change your underwear in time. However, if the bleeding is prolonged, you need to take certain anti-inflammatory and hemostatic drugs orally as appropriate.