This symptom appeared in the first half of 17 years. Without any special treatment, the symptom disappeared after a period of time. At that time, it was estimated that the consistent sitting posture in front of the desk computer caused cervical fatigue and injured nerves. Now I think it should be the elderly thrombus. I don't have high blood pressure, hyperlipidemia, hyperglycemia... I often insist on exercise.
When the clinical manifestations of arm numbness, injury and poor circulation in the local tissue of the arm are also the pathological manifestations of poor metabolism in the local tissue, it is necessary to closely observe the changes and take the methods of promoting blood circulation, dredging collaterals, promoting blood circulation and removing blood stasis and promoting tissue metabolism indicators for treatment.
The numbness and weakness of the left arm may be caused by overwork or muscle injury, but other reasons cannot be ruled out. If there is no improvement for a long time, it is best to go to the hospital for examination to see what causes it, and then take measures.
First of all, the situation you mentioned needs to consider several aspects. The first consideration is whether there is cervical compression. Second, we need to see if there is electrolyte disorder, such as severe hypokalemia. In addition, check whether there is stenosis and insufficient blood supply in cerebral vessels.