White hair on the back is usually related to clogged hair follicles and missing or dysfunctional melanocytes, but it can also be caused by disease factors such as malignant lanugo or leukoplakia.
1. Hair follicle clogging: many reasons lead to hair follicle clogging, individual hair follicles will have some problems in nutrient delivery, resulting in malnutrition, and the hair that grows out of the sweat will become thin and white.
2. Melanocyte deficiency or dysfunction: the absence or dysfunction of melanocytes in the hair follicle will affect the production of melanin, and the reduced melanin content will lead to the whitening of sweat hair.
3. Disease factors: white hair on the back may also be related to malignant lanugo or leukoplakia.
Patients with long white hair on the back should go to the regular hospital in time for examination, to clarify the cause of the disease, and follow the doctor’s instructions to standardize the treatment.