White patches on the back may be caused by vitiligo, lichen planus, white furfura and other factors.
1. Vitiligo: If the patient’s localized skin is damaged or exposed to the sun for a long time, it will lead to the destruction of melanocytes on the back, resulting in the localized skin because of the lack of melanin, which will lead to the formation of white patches symptoms.
2. lichen planus: if patients stay in a hot and humid environment for a long time, it will lead to the skin breeding a lot of sweat, which will lead to Malassezia infection. When the Malassezia bacteria infringe on the cuticle of the skin, it will cause white patches of symptoms to appear on the back.
3. Leukodystrophy: When patients develop leukodystrophy, it will also cause the symptoms of white patches on the back, which is mainly induced by dry skin, malnutrition, long-term exposure to the sun, lack of vitamins and other factors.
White patches on the back may also be other causes (such as post-inflammatory pigment loss, etc.), you need to go to the hospital in time for examination, to clarify the cause of the disease, and then give targeted treatment.