Numbness of the back of the hand may be due to peripheral neuropathy, local injury, vascular lesions and other causes, it is recommended to go to the hospital for a detailed examination, and then according to the specific causes, under the guidance of the doctor for symptomatic treatment. 1. Peripheral neuropathy: Alcoholism, drug metabolism, autoimmune and viral infectious factors may cause peripheral neuropathy, thus causing numbness of the back of the hand, according to the specific cause of the need to take symptomatic treatment. 2. Local injury: if the surface of the skin on the back of the hand external trauma, resulting in infectious injury, can cause numbness of the back of the hand, need to give local skin treatment and anti-infective, nutritive nerve drugs to improve the symptoms. 3. Vascular lesions: If there are stenosis and plaques in the arteries of blood vessels, resulting in hypoxia, ischemia and other symptoms, it can also lead to numbness on the back of the hand. It is recommended to give endovascular treatment and anti-inflammatory drugs under the guidance of the doctor’s advice. Normally, we should pay more attention, develop good living habits, eat a reasonable diet, pay more attention to safety and avoid bumping.