No, concealers do not harm your skin. These are made up of ingredients that are safe and do not cause any harm to your skin. But remember to buy the best products from trusted stores only. If you land up buying some duplicate or unauthentic product in the market, they may harm your skin and instead of making your skin look better, worsen it. At Limeroad, we provide you only the authentic beauty products picked up from the best brands which provide you detailed description of ingredients of the products you buy. This allows you to pick up only the products that suits your skin well in case your skin is sensitive.