A small bump next to the vulva is a little painful may be caused by folliculitis, vestibular gland cysts and other causes. 1. Folliculitis: when the skin and hair follicles of the vulva are damaged and irritated, bacteria will easily enter into the skin, thus triggering folliculitis, which manifests itself as a red pimple or pustular mound centered on the hair follicle, or a small pimple, which may be accompanied by itching, pain and other manifestations. 2. Vestibular cysts: Vestibular cysts are mainly related to chronic inflammation, congenital narrowing of the gland ducts, injuries, etc. They appear as cysts of varying sizes on the vulvar skin, and gradually increase in size from small ones, with symptoms of pain when secondary infection occurs. There may be other causes for the growth of a pimple next to the vulva and a little bit of pain, it is recommended to go to the hospital in a timely manner, complete the examination under the guidance of the doctor, and standardize the treatment after clarifying the cause of the disease.