If there is a hard lump on the vulva that is not painful or itchy, clinically it may be caused by the following: first, a cyst in the vestibular gland, when the ducts of the vestibular gland become blocked under the stimulation of chronic inflammation of the vulva. The cyst is formed when the vestibular gland is blocked by chronic inflammation of the vulva. The vestibular fluid has no way to drain, so it accumulates in the cystic cavity. The second is caused by the hard chancre of syphilis, which is often not painful when touched by hand and has no symptoms, and often has a history of high-risk sexual activity. The third is that if there are hard nodules on the vulva and they are not active when touched by hand, it is recommended to exclude the possibility of vulvar cancer.