Baby nail delamination may be caused by wear and tear, or malnutrition, nail fungus disease and other diseases. 1. Wear and tear: Because babies are young and more active, so in the process of playing or often gnawing nails will cause wear and tear on the nail plate, therefore, it is easy to lead to nail layering. 2. Malnutrition: This disease is mainly caused by insufficient intake of nutrients, imbalance of nutritional ratio or consumptive dysfunction, which is related to improper addition of complementary foods, insufficient breast milk, partiality, picky eating, and physical weakness. When the child is malnourished, it is easy to affect the normal growth and development, therefore, in some cases, there will be nail layering. 3. Nail fungal disease: the disease is caused by a variety of fungal infections of the nail plate and subnail tissues, which can lead to nail discoloration, loss of luster, thickening and breakage, and can also be manifested as nail layering. If your baby has layered nails, you need to go to the hospital in time to find out the exact cause.