White patches on the back of the neck may be due to vitiligo, lichen planus, post-inflammatory hypopigmentation, etc. They need to be analyzed according to the symptoms.
1. Vitiligo: it is a common acquired pigment loss skin and mucous membrane disease, manifested as white patches of skin or whitish skin, any part of the body can be involved, so it may lead to white patches on the back of the neck.
2. lichen planus: long-term use of glucocorticoid drugs, antibiotics, immunosuppressants and other reasons, resulting in a decline in the skin’s defense function, the growth and reproduction of Malassezia bacteria will form lichen planus, which may lead to the back of the neck with white patches.
3. Post-inflammatory hypopigmentation: previous trauma, eczema, dermatitis and other diseases may cause hypopigmentation after recovery, resulting in white patches on the back of the neck.
White patches on the back of the neck may have other causes, you need to go to the hospital in time to check and clarify the cause of the disease.