How often should you use a skincare mask? Experts say knowing what the mask is providing is essential when deciding how often you should use a mask. For example, oily skin can become too greasy if you overuse masks with hydrating formulas, and frequently using exfoliating masks without proper recovery time can cause a compromised skin barrier. If you notice irritant dermatitis that appears as dry, flaky, itchy areas of the skin, you could be over-masking. Consider temporarily pausing their use and switch to a gentler routine.