Right thumb tremor may be caused by physiological factors, may also be caused by certain diseases, such as tenosynovitis, Parkinson’s syndrome. 1. Physiological factors: physiological hand tremor often occurs in the case of nervousness, fear, emotional excitement, severe pain and muscle fatigue, and can be relieved after appropriate rest and calming. 2. Tenosynovitis: Repeated flexion and extension activities of the thumb lead to repeated friction of the tendon sheath, resulting in edema, and the formation of aseptic inflammation in the local area, thus stimulating the flexor tendon, which causes tendon spasm when the thumb is flexed, leading to finger shaking. 3. Parkinson’s syndrome: Due to the degeneration of nigrostriatal neurons in the basal ganglia region, dopamine secretion decreases, which causes an imbalance in the ratio of dopamine and acetylcholine, leading to changes in nerve excitability and causing the thumb to shake. Right thumb tremor may also be caused by hyperthyroidism, cervical disc herniation, cerebrovascular disease and other factors, physiological factors caused by the right thumb tremor, generally after rest can be effectively relieved. After excluding physiological factors, it is recommended that the patient go to the hospital in time, under the guidance of the doctor for treatment.