Vaginal pimples are likely caused by contact dermatitis. This is a reaction to something that touches the skin. Any irritation of the skin can result in the formation of pimples. Contact dermatitis of the genitals may be caused by sensitivity to:
– Bubble baths and soaps, especially if they contain fragrances
– Feminine wipes, deodorants, lotions, powders, or perfumes
– Tampons or sanitary pads, learn how to choose the right sanitary pad here
– Spermicides, condoms, lubricants, or sexual arousal stimulants