If the thumb sometimes shakes, there are usually several reasons. 1, the peripheral nerve radiculitis factor, in the peripheral nerve radiculitis, especially diabetes combined with peripheral neuritis will appear thumb finger often shaking situation. 2, in the ion disorders, especially the body low potassium and sodium hyponatremia will appear finger shaking clinical symptoms and performance. 3, such as rheumatism, rheumatoid arthritis and other conditions, in the finger when the inflammation will also appear thumb shaking situation. 4, the thumb is prone to nail infection or fungal infection, in the finger around the connective tissue inflammation or cellulitis because of inflammation. 4, the thumb is prone to nail infection or fungal infection, in the fingers around such as the occurrence of connective tissue inflammation or cellular inflammation, because of the inflammation of the stimulation will also appear thumb finger shaking situation. 5, such as cervical spondylosis compression of the nerve root will also appear thumb finger shaking clinical symptoms and performance. 6 Parkinson’s disease or other tremors; 7 poor sleep extreme exertion, etc.