When pain occurs in the perineum, three conditions are most likely to be present: 1) vaginitis. 2) vulvovaginitis. 3) vestibulitis. Each of these inflammatory diseases has its own characteristics, so you can determine which one is the case according to your own situation. First of all, vaginitis is often characterized by increased leukorrhea, which can be tofu-dregs-like or yellow pus-like and is often accompanied by vulvar itching. Second, vulvovaginitis, the inflammation of vulvitis is confined to the vulva, there is no change in the leukorrhea, the gynecological examination can see the inflammation is confined to the vulva, and you can even see a red rash. Finally, vestibulitis is often associated with swelling and pain at the perineum, and a raised mass can be palpated at the vestibular gland, which varies in size from the size of a peanut bean when it is small to the size of a walnut when it is large. The exact cause of the pain in the perineum can be determined after examination at the hospital.