If there is a large, hard bump on the vulva that is not painful, this is often due to a vestibular gland cyst. Vestibular gland cysts are mainly due to chronic inflammation of the vulva or vagina, which leads to blockage of the opening of the vestibular gland and prevents the discharge of vestibular fluid, which slowly accumulates in the cystic cavity and forms a cyst. In this case, there is often no clinical pain or discomfort, but when washing the vulva, a hard bump is found. In addition, if a hard bump is accompanied by pain and localized redness, it is usually due to local inflammation of the vulva and can be treated with topical application of Bactrim after washing.