Sudden numbness and tightness of the hand when hiking, may be related to overwork, may also be due to cerebral blood supply, peripheral neuritis and other reasons; in the treatment of the main reasonable rest, appropriate massage and hot packs, for the original application of drugs and so on. 1. Excessive exertion: If the hiking time is too long, resulting in excessive muscle tension, resulting in local muscle strain, it may cause sudden numbness and tightening of the hand. In this case, we should pay more attention to rest, work and rest; at the same time for local hot compresses, massage, improve local blood circulation, relieve the above symptoms. 2. Insufficient cerebral blood supply: in the process of mountaineering, if a lot of sweating fails to replenish water in time, resulting in a decrease in blood volume, local cerebral blood flow perfusion is insufficient, thus causing insufficient blood and oxygen supply to the brain tissues, which may show sudden numbness of the hands tightening during mountaineering; attention should be paid to proper rest, timely replenishment of water to restore the normal blood supply of the brain tissues, and to improve the above symptoms. 3. Peripheral neuritis: If you suffer from peripheral neuritis, the blood circulation of the nerve endings is impaired, resulting in peripheral nerve sensory impairment, which will cause numbness of the hands. This kind of patients may aggravate the above symptoms due to over exertion when hiking, thus causing sudden numbness and tightening of the hands. Immunomodulatory drugs such as dexamethasone and immunoglobulin can be applied; neurotrophic drugs such as B vitamins and methylcobalamin can be applied for treatment. Sudden numbness and tightness of the hands during mountaineering, if the symptoms continue to be unable to improve, you should stop mountaineering in time and seek medical treatment as soon as possible, after clarifying the causative factors, and then be guided by the doctor to carry out the treatment.