Layered nail loss in children may be due to hand, foot and mouth disease, nutrient deficiencies, and damage to the nail bed. After clarifying the cause of the disease, standardized treatment should be carried out according to the specific situation. 1. Hand, foot and mouth disease: caused by coxsackie virus or enterovirus. Layered loss of nail cover often occurs within six months after the onset of the disease, but new nails will grow as the old ones fall off. Antiviral drugs, such as acyclovir antiviral therapy, can be used for treatment. 2. Nutrient deficiencies: For example, deficiencies in iron, calcium, zinc and other elements can lead to layering and loss of nail caps. Treatment should be more iron, calcium and zinc containing substances, such as animal liver. 3. Damaged nail beds: If the nail is squeezed by external forces, it will gradually blacken to the point where the nail falls off, and will gradually grow a new nail by itself. If the nails are infected, such as onychomycosis or fungal infection, it will lead to gradual loss of nail bed nails, and penicillin and other anti-infective treatment can be applied. If the above symptoms occur, consult a doctor in time and standardize the medication under the doctor’s guidance after a clear diagnosis.