The main reasons for right hand muscle jumping and hand shaking include physiological reasons and pathological reasons. 1. Physiological causes: prolonged high-intensity hand activities will cause tonic contraction of the hand muscles, causing hand muscle spasm, the right hand tiger’s mouth muscle jumping hand tremor; secondly, cold stimulation, high emotional tension, will cause local vascular contraction, spasm, peripheral nerve transient nerve excitation, may also cause the right hand tiger’s mouth muscle jumping hand tremor. 2. Pathological causes: nerve-muscle joint lesions, motor neuron lesions, spinal cord injury and peripheral neuropathy, may also cause the right muzzle muscle jumping hand tremor. For example, cervical spondylosis, myasthenia gravis, poliomyelitis, diabetes mellitus and so on. Pathologic causes may cause abnormal discharge of neurons innervating the right hand tiger’s mouth area, resulting in muscle tonus or spasm, which may also cause the right hand tiger’s mouth muscle to jump and shake. There may also be other causes of right hand tiger’s mouth muscle tremor, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or therapy.