The finger (toe) nail is the product of epidermal keratinization of the finger (toe) end, which protects the finger (toe) end. The nail is also called the nail plate, the front end is the tip of the finger, and the back part is in the subcutaneous tissue called the nail root. The nail bed and nail root are rich in blood vessels, which provide rich nutrition for nail regeneration. A normal child’s nail is pink, smooth and tough, with a slightly lighter nail half-moon color. Clinically a part of the nail is delaminated and peels off in sheets, called nail stripping disorder, or nail delamination. It is commonly associated with malnutrition and can also be seen in skin conditions such as lichen planus. If a child is a picky eater or a partial eater, this may lead to an unbalanced or lack of nutritional intake, which may result in nail delamination. It is recommended that the diet should be diversified, with a reasonable mix of nutrients, a balanced arrangement of meat and fish, and more fresh fruits and vegetables; if the nail is damaged by fungal infection, it is necessary to cut and peel off part of the empty nail at this time, and some disinfectant and anti-mold infection drugs can be applied to the affected area daily to prevent infection. In short, whether it is malnutrition or fungal infection, nail delamination also directly reflects the phenomenon of unhealthy children, so mothers should be vigilant, if necessary, to the hospital for detailed examination and treatment.