No, it will not cause hyperpigmentation (dark spots) on your skin, however, if you spend time in the sun after waxing, you can burn, which can result in sun damage and dark spots later on. If your skin is tan or you’ve applied sunless tanner, it will strip your tan. Remember, waxing will exfoliate your skin. The wax sticks to your skin and removes the topmost layer so you may experience some lightening if you have a dark tan from sun or sunless tanning products.