If you get redness and bumps, you're probably reacting to an ingredient in the wax or the friction that occurs when it's pulled off, says Dr. Wu. Treat the area with a few dabs of hydrocortisone cream. Switch to a natural sugar-based wax (like Parissa Chamomile body sugar, $12; parissa.com) that's less likely to aggravate skin. We like Olay's Facial Hair Removal kit, which comes with a waxy balm to smooth on before depilatory cream. "It protects skin and reduces the chance of irritation," says cosmetic chemist Ni'Kita Wilson.
Olay Smooth Finish Facial Hair Removal Duo, $25; olay.com.Read MoreLess