Small white spots on the body may be caused by vitiligo, anemia nevus, florid chaff rash and other reasons. 1. Vitiligo: when the melanocytes in the skin are destroyed, so that the lack of melanin in the skin can cause the phenomenon of white spots on the skin, which can occur in various parts of the body, can be manifested as a symptom of the small white spots on the body. 2. Anemic nevus: when the development of vascular tissue in the body is abnormal, resulting in congenital dysfunction, so that the skin pigmentation is reduced, often manifested in the trunk, limbs and other parts of the pallid patches of irregular shape, which will lead to the symptoms of small white spots on the body. 3. maculopapular furuncle: in most cases, it is due to the involvement of Malassezia in the stratum corneum of the skin to make the sebaceous glands secreting parts of the phenomenon of dotted patches and gradually increase, when the body skin tissue is infected by Malassezia, it will cause the symptoms of small white spots on the body. Causes of small white spots on the body of more causes, the specific situation also need to go to the hospital skin related examination, clear cause, timely targeted treatment.