Ingrown hairs form when dry skin cells block the surface opening for hairs growing back after shaving, waxing, electrolysis or any other form of hair removal. Failing to grow out of the skin, the hairs curl inside the follicle underneath the skin and the resulting foreign body reaction causes an unsightly infectious bump. Both women and men suffer from ingrown hairs. To prevent ingrown hairs from forming you must follow the appropriate home care advice: