The white spots may be caused by vitiligo, idiopathic leukoplakia, and pityriasis simplex, which can be treated by using glucocorticoid creams, immunosuppressant drugs, and vitamin D3 derivatives. 1. Vitiligo: Vitiligo caused by white spots is a kind of pigment loss skin disease caused by the decrease or reduction of melanocytes. Patients can be treated by using glucocorticoid ointment, such as hydrocortisone butyrate ointment, fluticasone propionate ointment, etc., which is prohibited for those who are allergic to the drugs. 2. Idiopathic white spots: Idiopathic white spots are commonly seen in the elderly, manifested as white spots on the limbs of the limbs of the size of rice grains, the number of which is relatively large. Generally, no treatment is needed. 3. Furfury simplex: Furfury simplex is a kind of chronic skin disease with unknown cause, and furfury simplex may also trigger the phenomenon of white spots in patients. It can be treated by strengthening moisturizing and using mucopolysaccharide polysulfate ointment. When patients appear white spots, it is recommended to go to the hospital in time to find out the cause of the disease, and then follow the doctor’s instructions to use medication, do not use drugs privately, so as not to aggravate the condition.