There are many reasons for white spots on nails, such as: nail fungus disease, trauma and other reasons. 1. Nail fungus disease: Fungal infections cause lesions in the nail bed and subnail tissues, which may cause nail color changes, as well as thickening of the nails and brittleness of the nails, which may lead to white spots on the nails. You should go to the regular hospital in time for examination and choose antifungal treatment measures under the guidance of the doctor. 2. Trauma: trauma to the nails may cause transparent white spots on the nail plate, resulting in punctate white nails, manifesting the appearance of white spots on the nails. Generally no special treatment is needed, and most will recover on their own. Nails have white spots, there may be other reasons need to go to the hospital to check, clear cause of the treatment as prescribed by the doctor.