White patches on the neck are considered to be related to solar dermatitis, lichen planus, vitiligo, and congenital anaplastic nevus.
1. solar dermatitis: solar dermatitis is prone to occur in the hot summer, refers to the exposure to ultraviolet radiation, resulting in acute inflammation of the skin. After inflammation, pigment synthesis is impaired, resulting in localized white patches.
2. lichen planus: lichen planus is a superficial infection caused by Malassezia bacteria that invades the stratum corneum of the skin. It leads to localized skin abnormalities, such as punctate macules, round patches, and furfuraceous scales.
3. Vitiligo: the specific cause of vitiligo is not yet completely clear, according to related research, with autoimmune diseases, psychoneurological factors, genetic factors, melanocyte self-destruction and so on. The main manifestation of the skin damage parts of hypopigmentation, white, easy to occur in the friction or sunlight irradiation parts.
4. Congenital anaplastic nevus: anaplastic nevus belongs to congenital diseases, which may lead to white patches on the neck. Besides, anemic nevus may also lead to poor distribution of local capillary network, which is manifested as white patches on the neck.
To sum up, there are many reasons for white patches on the neck, it is recommended to pay attention to daily care, pay strict attention to sun protection when going out, go to the dermatology department of the hospital if necessary, to clarify the cause, and standardize the treatment in accordance with the doctor’s instructions.