A yellow pimple in the vagina may be caused by vaginal inflammation, cervical natriuretic cysts and other reasons, or it may be a normal phenomenon. 1. Vaginal inflammation: some patients with vaginitis due to inflammatory stimulation of the vaginal mucosa, local tissue hyperplasia to form a bump similar to a yellow pimple. 2. Cervical nuchal cysts: some patients with chronic cervicitis due to inflammatory stimulation, the connective tissue around the cervical glandular ducts hyperplasia leads to glandular compression, secretion discharge is not smooth, thus forming cervical nuchal cysts, which looks like a yellow pimple. 3. Normal phenomenon: there is a part of the vagina is more loose women, sometimes in the external can directly see the cervix, the normal cervix will be mistaken for the vagina of the yellow pimples. Women found that there are yellow pimples in the vagina may also exist other reasons, it is recommended to go to the hospital in a timely manner, improve the relevant examination, under the guidance of a professional doctor to clarify the cause of the disease, targeted treatment.