A pimple on the vulva may be caused by vulvar folliculitis, condyloma acuminatum, and vestibular gland cysts. 1. Vulvar folliculitis: patients due to damaged hair follicles, skin by adverse stimuli and other reasons lead to skin barrier function damage, easy to be invaded by bacteria, the emergence of follicular inflammatory lesions. The result is a pimple on the vulva. 2. Condyloma acuminatum: patients are infected with human papilloma virus through sexual contact, indirect contact or direct transmission from mother to child. Cauliflower-like, papillomatous growths can be seen on the pubic area. 3. Vestibular cysts: Due to the obstruction of the opening of the vestibular gland duct, secretions cannot be discharged and accumulate in the gland cavity, resulting in the appearance of protuberances on the vulva. Sometimes it can be accompanied by redness, swelling, pain and other discomforts. A pimple on the vulva may also be caused by other reasons, you need to consult a doctor for examination, to clarify the cause of the disease, if necessary, under the guidance of the doctor for standardized treatment.