Fingernail skin buckling up is considered to be related to poor contact history, nutritional deficiencies, and bacterial viral infections. 1. Bad contact history. Frequent contact with alkaline detergents or solutions, allergic substances such as soap, detergents, and laundry detergents can lead to allergic reactions or excessive drying of the skin, and the skin next to the fingernail may buckle. 2. Nutritional deficiencies. Usually do not pay attention to nutritional supplementation, resulting in a variety of nutrients lack, such as vitamin B deficiency, vitamin E deficiency, the skin lack of nutrient supply, prone to skinning, peeling. 3. Bacterial viral infection. Fingers next to the skin buckled, if accompanied by redness, swelling and pain, can also be considered related to infection, such as bacterial and fungal infections lead to skin barbs, may cause pus. If there is any discomfort, it is recommended to consult a doctor promptly.