Vaginal burning and large painful red bumps occuring in the

After masturbation it feels like its burning there and if i dont go the the bathroom and wash immediatly itll continue to burn also if i dont shave right at the top of my vaginal lips i get 1 or 2 sore red bumps they hurt to touch i was wondering if these are ingrown hairs from the hair being too long please help me my mother isnt around to help me and i dont exactly feel comfortable asking my step mother...