Small hard lumps on the vulvar skin may be caused by folliculitis, sebaceous cysts, warts and other reasons. 1. Folliculitis: due to the usual lack of attention to vulvar hygiene, may lead to vulvar skin follicles of bacterial infection, suffering from folliculitis, manifested in the phenomenon of small hard lumps of vulvar skin, but at the same time may also be accompanied by a painful sensation. 2. Sebaceous cysts: some women have excessive accumulation of sebaceous glands in the hair follicles of the vulvar skin, forming sebaceous cysts, which are manifested as small hard lumps on the vulvar skin. 3. Condyloma acuminatum: some patients infected with human papilloma virus may cause condyloma acuminatum, manifested as small hard lumps of vulvar skin phenomenon, but at the same time can also be seen in the local cauliflower-like raised bumps. The reason for this is the fact that it is not a good idea to have a good time, but it is a good idea to have a good time, and it is a good idea to have a good time.