The appearance of white spots on the body is often caused by diseases, common causes include pityriasis versicolor and vitiligo, which need to be identified and treated immediately. 1. Simple chaffing: people who are often exposed to the sun and wind and malnutrition are prone to white chaffing, which is more common in the spring. White furfura occurs on the face, neck, shoulders and so on, at first it is a slightly elevated red spot, when the red spot gradually fades, it will turn into a hypopigmented white spot. When the skin inflammation, the use of glycerite, tacrolimus and other external treatment. 2. Vitiligo: Vitiligo is a disease of melanin deficiency and white patches of the skin, which is mainly related to heredity, immune system disorders and other factors. The main manifestation of this disease is the face and neck, waist and abdomen and other parts of the white patches of varying sizes and numbers. It is often treated by medication including tacrolimus and carbotriol. Drugs need to be selected under the guidance of a doctor. When patients experience discomfort, they should go to the hospital in time to find out the cause and follow the doctor’s instructions for treatment.