There are many factors that lead to labial hardness, and the common ones are vestibular cysts, folliculitis, condyloma acuminatum and vulvar fibroma and other diseases. 1. Vestibular cysts: mostly mixed bacterial infections, due to pathogens invading the glandular ducts, resulting in exudate agglutination, obstruction, mucus secretions can not flow out of the formation of vestibular cysts, mostly unilateral, but also bilateral, often manifested as the formation of hard lumps in the labia, localized swelling, pain. 2. Folliculitis: when the hair follicles of the labia are infected by pathogens, inflammatory lesions can be produced, resulting in proliferative changes in the local tissues, forming hard lumps on the labia, which can be accompanied by redness, itching and other symptoms. It is recommended to ensure that the vulva is clean and dry, you can also apply mupirocin, erythromycin ointment and other drugs, should pay attention to pregnant women as well as breastfeeding women, should be used under the guidance of a physician. 3. warts: is caused by the human papilloma virus, mainly through sexual transmission, the symptoms of local itching, pain, can be seen in the labia pale red or gray pimples, wart-like protrusion, often fused to form a vegetable pattern of superfluous organisms. 4. Vulvar fibroma: mostly belongs to benign vulvar tumors, by fibroblasts proliferation, the formation of subcutaneous nodules, the size varies, the surface can have ulcers and necrosis. Conventional treatment is local excision along the tumor. In addition to the common causes mentioned above, the causes of hard lumps in the labia can also include vulvar squamous cell carcinoma, vulvar smooth muscle tumor and other diseases. If you find hard lumps at the vulva, it is recommended to seek medical treatment in time to avoid worsening the condition.