When the vulva is red and swollen, there are many factors, and we need to know which one before we can use the right medicine. 1. If the vulva is red and swollen because the underwear is not changed in time, the vulva is not washed in time, or the vaginal secretions are stimulated, it is advisable to buy a lotion from a pharmacy, such as gynecological cleanser or cleansing lotion, as long as it is a special gynecological lotion. 1:10 water is used for sitting in the basin for 15 minutes. Observe for 3-5 days and insist on using it for 7 days as long as it works well. If the result is not good, it is recommended that the vaginal discharge should be checked. 2. For edema caused by excessive stimulation of the vulvar mucosa during intercourse, apply cold compresses for 15 minutes each time, twice a day, to relieve swelling. You should also wear loose clothes to avoid over tight stimulation which can cause hematoma of vulva and may even cause bleeding, and you must pay attention to good personal hygiene.