The reason why there are white lumps on the toenails: 1, white lumps on the nails are higher than the normal nail surface, and there is white powdery material falling off the affected area with the hand buckle, it may be fungal infection caused by onychomycosis, and use amorphophine hydrochloride application to rub the affected nails. 2, white lumps on the nails are not higher than the normal nail surface, and there is no pain in the hand pressure, it is considered to be the lack of zinc, it is recommended that you go to the hospital to draw blood and laboratory tests for trace elements, and after diagnosis, you can orally take zinc gluconate treatment. 3, if the children appear this situation, and accompanied by abdominal pain, anal itching at night, sleep grinding symptoms, consider intestinal parasitosis, take the child to the hospital stool routine, if the results of the examination of eggs can be diagnosed, so that the child fasting albendazole, the intestinal parasites will be discharged out of the body, intestinal parasites discharged after a period of time on the nails of the white spots can disappear. 4, nails by trauma, some kind of chemical contact with the surface of the nail will also appear, first find the cause of symptomatic treatment can be.