Many people have had the experience of growing barbs next to their nails, barbs, also known as nail edge reverse peeling, refers to the skin around the fingernails to inverted, tearing, warping as a characteristic of a lesion, mostly longitudinal triangular tearing, the tip of the tip peeling upward or inverted, painful to touch, mostly associated with a lack of vitamins or too dry skin. If the hands are frequently exposed to overly alkaline or acidic items such as hand sanitizers, detergents, and dishwashing liquids due to work, it is easy for the epidermis around the nails to undergo irritating changes, which leads to local hyperkeratosis, and the elastic fibers of the skin to produce breaks, which in turn causes keratotic changes on the surface of the skin, and thus nail inverts will form.