A hard lump inside the labia majora is considered to be caused by folliculitis, cysts or warts. 1. Folliculitis: a hard lump in the labia, most of the consideration is caused by folliculitis, accompanied by the phenomenon of local skin redness, swelling and hot pain. 2. Cysts: If there is further aggravation of inflammation, it is easy to lead to the blockage of the gland mouth, then it will gradually form cysts. 3. Condyloma acuminatum: Condyloma acuminatum is usually a small, unevenly distributed reddish papule in the lesion area, which gradually increases in size, with an uneven, rough cauliflower-like, papillary surface. If you find that there are abnormal bumps generated in the labia majora, then it is recommended that you seek medical attention in time to identify the specific causes and treat the symptoms.