If the problem of hand trembling occurs when you are nervous, it may be due to the following two reasons: 1, tension, anxiety caused by emotions, when they are particularly nervous, anxiety, will cause disorders of the plant nervous function, there will be headaches, dizziness, nausea, vomiting, body discomfort, trembling and other somatic reactions, especially hand trembling, foot trembling, head shaking and other problems. If some of these reactions occur, they may be somatic reactions caused by anxiety disorders. 2, there may also be behavioral habits, that is, when they are nervous immediately appear hand trembling problem, which may be a conditioned reflex, especially from childhood to the problem of nervousness and hand trembling, must be actively adjusted, the above two reasons are more common.