Pain in the labia, including the vagina, after intercourse can be caused by excessive and frequent straining during intercourse, causing edema of the mucous membrane of the vaginal wall, which may cause pain. Especially in women who have not given birth, the vaginal wall is too tight and can cause irritation and pain during intercourse. If possible, you can go to the pharmacy and buy a lotion, such as gynecare or cleansing lotion, and take a 15-minute sitz bath in 1:10 water, apply erythromycin ointment locally, observe the situation, wear loose underwear and do not have intercourse in the near future. It may also indicate the presence of vaginal inflammation, because the pain after intercourse may be aggravated by vaginal inflammation.