How do you get rid of a rash from waxing?

If the rash is an allergic reaction to the waxing, using hydro-cortisone cream will help relieve any bumps or itching. If the rash is caused by ingrown hairs (which you notice in due time after the initial wax) then the best way to rid of and prevent further ingrowns is to exfoliate the skin 2-3 days post-waxing. Exfoliate all month with either a gentle, topical salicylic or glycolic acid solution) or manual grit (like a sugar scrub or washcloth). Ingrown hairs are especially common along the bikini line.