The arm spots may be caused by vitiligo, pigmented nevus, age spots, coffee spots and other diseases.
1. vitiligo: the cause of vitiligo is not yet completely clear, the current authority reported that the disease may be related to neuropsychiatric factors, genetic factors, autoimmune diseases, which leads to the damaged parts of the pigment loss spots.
2. pigmented nevus: the cause of the disease is not yet clear, may be related to heredity, developmental abnormalities, etc., the disease is a nevus cells composed of benign neoplasm, is a common clinical benign skin tumor. It is a benign neoplasm composed of nevus cells, and is a common benign skin tumor. It mainly manifests itself as papules, patches or plaques of different sizes, colors and forms on the skin.
3. Age spots: also called seborrheic keratosis, the cause of which is unknown, and is considered to be related to skin aging, heredity, ultraviolet radiation and other factors. The lesions are commonly found on the scalp, face, trunk and upper limbs, resulting in localized brown or dark brown patches.
4. Coffee spot: the cause of coffee spot is not known, may be related to heredity, certain diseases (such as neurofibroma, etc.). The disease may exist at birth or shortly after birth, mainly manifested as light brown patches with clear boundaries, which may occur in any part of the body such as torso, face, arms and so on.
There are more reasons for arm spots, and different types of diseases have different treatment methods. It is suggested that patients should go to regular hospitals in time to find out the causes of arm spots, and then give symptomatic treatments according to the causes of the disease.