The finger (toe) nail is the product of epidermal keratinization of the finger (toe) end, which protects the finger (toe) end. It is divided into nail plate, nail bed, nail fold, nail groove, nail root, nail epithelium, nail hypodermis and other parts. The nail growth is caused by the proliferation and keratinization of the nail root’s nail cells, which move forward across the nail bed, but the nail bed controls the growth of the nail in a certain shape. The nail bed and nail root are richly vascularized, and these provide abundant nutrition for nail regeneration. Clinically, a part of the nail is delaminated and peels off in sheets, called nail stripping, or nail delamination. It is commonly seen in malnutrition and also 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 to diversify the diet with a reasonable mix of various 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 and apply some disinfectant and anti-mycotic infection medication to the affected area daily to prevent infection. Whether it is malnutrition or fungal infection, nail delamination is also a direct reflection of the child’s unhealthy body, so mothers should be alert and go to the hospital for detailed examination and treatment if necessary.