 Your gel manicure may be damaging your skin. Yes, they may last longer than regular polish, but a recent study found that UV dryers used for gel manicures can cause serious mutations seen in skin cancer. To protect yourself, always apply sunscreen to your hands about 20 minutes before your manicure. Never wear any fragrances or skincare products. Some can actually increase your sensitivity to UV rays. Limit dryer use to just 10 minutes per hand, or invest in a pair of UV absorbing gloves.