White spots on the hands after sun exposure may be caused by hypopigmented spots, vitiligo, tinea versicolor and other reasons.
1. hypopigmented spots: if the skin is often under ultraviolet rays, usually do not pay attention to sunscreen, may cause sunburn or solar dermatitis, after the inflammation subsides, the local will be post-inflammatory hypopigmented manifestations, resulting in white spots on the hands.
2. Vitiligo: Vitiligo is a skin and mucous membrane pigment loss disease, can occur in any part of the body, easy to occur in the friction or sunlight irradiation parts, can be manifested in the hands of white spots.
3. ringworm: if the skin is often in the ultraviolet light, the human body sweats more, resulting in a moist environment, easy to secondary fungal infection caused by ringworm, resulting in local flaking, white spots.
There may be other reasons for white spots on the hands after sunbathing, and it is recommended that you visit a regular hospital in time for standardized treatment under the guidance of a specialist.