White spots on nails are generally common in trauma, onychomycosis, micronutrient deficiencies and other skin diseases. 1. trauma: when the nails are traumatized, it can lead to white spots on the nails, the milder ones generally do not need to be dealt with, and the serious ones can be dealt with by hot compresses, and if necessary, timely consultation. 2. Nail fungus: commonly known as gray nails, also due to fungal infections, the nails may appear thicker and more brittle or even the possibility of cracking, can be treated by applying 8% cyclopiazone nail coating. 3. Micronutrient deficiency: when the body lacks micronutrients, the symptom of white spots on nails may also occur, patients are advised to have a balanced diet, eat more vegetables, fruits, soy products, and so on. Nails long white spots, may also be caused by other factors, it is recommended that patients go to the dermatology department, clear cause, under the guidance of the physician symptomatic treatment.