The reasons for the darkening of the back of the hand include physiological factors and pathological factors. Pathological darkening of the back of the hand can be manifested by the symptoms of certain diseases, such as seborrheic keratosis, chronic hepatitis and so on.
1. Physiological factors: due to prolonged exposure to ultraviolet radiation is too strong environment, resulting in an increase in pigment particles in the epidermal cells of the skin, the hand or the back of the hand skin blackening can occur. In addition, long-term exposure to certain chemical substances, such as manganese dioxide, etc., can also cause the back of the hand blackening.
2. Pathologic factors:
(1) Seborrheic keratosis: mostly seen in middle-aged and old people, it is a kind of degenerative skin changes, manifested as single or multiple light brown or dark brown patches and spots on the face, back of the hand exposed parts. Generally not accompanied by conscious symptoms, without treatment, if necessary, freezing, laser and other methods to remove.
(2) Chronic hepatitis: viral infections, drugs and immune effects and other factors act on the liver, causing damage to liver cells and inflammatory changes in the liver. Patients with chronic hepatitis can have liver disease face, which is specifically manifested as grayish color without luster, yellowish and blackish skin and sclera, without elasticity.
Can follow the doctor’s instructions to use reduced glutathione, tibivudine and other drugs for treatment, daily need to avoid drinking alcohol, avoid using drugs that damage the liver.
The back of the hand black, exclude physiological factors, should be timely consultation, clear diagnosis under the guidance of the doctor targeted treatment.