White spots on fingernails may be caused by congenital white nail disease, onychomycosis and iron deficiency anemia. 1. congenital white nail disease: the clinical manifestation of point white nail, line white nail, part of the white nail and all white nail, etc., the cause of its cause may be related to heredity, lack of vitamins and other factors. 2. Ringworm of the nails: the formation of ringworm of the nails is mostly due to the fungus invasion of the nail plate. The patient’s nails will appear discoloration, separation, unevenness and other symptoms, and the color of the nails is mostly white, dirty color and so on. 3. Iron deficiency anemia: its cause is mostly related to the imbalance of iron absorption and excretion in the body, patients will appear weak, easy to fatigue and pale nails and other symptoms, part of the patients will appear white spots on the fingernails. There are many reasons for white spots on fingernails, and it is recommended that patients go to regular hospitals to get a clear picture of the cause of the problem.