Vitiligo is a loss of skin pigmentation caused by the disappearance or functional destruction of melanocytes in the skin and hair follicles. The white spots of vitiligo are different from the hypopigmented spots that appear in other diseases and have the following characteristics: 1. The white spots of vitiligo can involve any part of the body, including the skin, mucous membranes, hair, etc.
3, the hair at the white spot can be white, but also can not change white.
4.The texture of the skin at the white spots is consistent with normal skin, without atrophy, scaling, drying or hair loss.
5, if the white spots are in the progressive stage, new white spots may appear at the original normal skin color due to improper local medication or physical stimulation (homotypic reaction).
The hypopigmented spots that need to be distinguished from vitiligo include: anemic nevus, non-pigmented nevus, pigmented incontinence, pityriasis simplex, lichen planus, solar leukoplakia, senile leukoplakia, white atrophy, post-inflammatory pigment loss, discoid lupus erythematosus, etc.