Children’s fingernail loss is usually due to trauma, malnutrition, fungal infection and other factors. 1. Trauma: when a child’s fingernails are bumped, squeezed and other traumatic injuries, the nail bed can be damaged, resulting in nail loss, and will be accompanied by local redness, swelling, bruising and other phenomena. 2. Malnutrition: small children over-eating, picky eating, can make the body lack of nutrients, thus affecting the growth of fingernails, resulting in nail loss, and can be accompanied by edema, anemia, dry skin and other symptoms. 3. Fungal infection: If the skin fungus violates the nail plate and under the nail, it can trigger ringworm of the nail, leading to the patient’s sick nails appear cloudy, discoloration, atrophy, shedding and other phenomena. Children’s fingernail loss, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.