Arm weakness and hand shaking are usually due to the following factors: First, the most common factor is hypoglycemia. When blood glucose is less than 2.8mmol/L, because the transient low blood glucose is relatively obvious, there will be no strength in the arms, weakness and hand tremor and other clinical symptoms and performance. Secondly, weak arms and trembling hands are also common in hypokalemia, such as low potassium periodic paralysis and ionic disorders, there will be weakness, weak arms, accompanied by hand shaking and hand tremor as the main clinical symptoms. Thirdly, in endocrine metabolic diseases, such as common hypothyroidism and adrenocortical insufficiency, the above clinical symptoms and manifestations will also occur. Fourth, for example, the common cerebrovascular disease, such as cerebrovascular transient blood supply insufficiency, cerebral infarction, cerebral embolism or acute cerebral hemorrhage, etc., will also appear in the above clinical symptoms. Fifthly, common conditions such as vegetative nerve dysfunction will also cause arm weakness and hand tremor.