White spots on the hands may be vitiligo, but also may be caused by lichen planus, simple furfura, anemia nevus, post-inflammatory hypopigmentation and other factors. It is recommended to go to the dermatology department of the hospital, which can determine the type of the disease. 1. Vitiligo: Vitiligo is a limited, primary, generalized skin and mucous membrane pigmentation disorder that can occur in any part of the body and is prone to friction and sun exposure. 2. lichen planus: lichen planus, also known as lichen planus furfur, is caused by Malassezia infection, the skin may appear pitting rash, round rash, furfuraceous scales. 3. Furfura simplex: Furfura simplex is a kind of dermatitis, mainly characterized by cellular furfuraceous scaly hypopigmented spots, as the main feature. 4. Anemia: Anemia nevus is genetically related and is a congenital hereditary disease. It causes whitening due to local skin ischemia and forms white patches. 5. Post-inflammatory hypopigmentation: the skin is damaged before, and in the process of recovery, the synthesis of melanin is affected, resulting in local whitish color. There are more reasons for long white patches on hands, not necessarily caused by vitiligo. It is recommended to go to the regular hospital dermatology department for examination, can be clearly diagnosed after standardized treatment.