The patient’s hand tremor and mouth tremor may be caused by some mental factors, such as tension, emotional excitement, and overexertion, etc. The symptoms will usually gradually decrease after these factors are lifted. However, they may also be caused by idiopathic tremor, Parkinson’s disease and hyperthyroidism. For these reasons, in addition to taking medication as prescribed by the doctor, the patient’s family should give good care to promote recovery.1. Idiopathic tremor: It is often related to genetics, environment, age, disease and other factors. Those with mild symptoms can be treated with drugs such as propranolol and paroxetine; those with severe symptoms need to be treated by surgical methods such as thalamic disruption and deep brain electrical stimulation; 2. Parkinson’s disease: due to the absence of neurons in the dense zone of the midbrain substantia nigra, endogenous dopamine is reduced, resulting in symptoms such as hand tremors, foot tremors, reduced movement and muscle tonicity. Patients need to take anticholinergic drugs and dopa drugs etc. for treatment under the guidance of professional doctors; 3. Hyperthyroidism: due to excessive secretion of thyroid hormones, which leads to active muscle reflexes and shortened time for reflex recovery, thus causing symptoms such as hand trembling and mouth trembling, the commonly used drugs for this disease are imidazole and thioredoxin. In addition, non-disease factors such as excessive emotional stress and long-term alcohol consumption can also cause hand tremors and mouth tremors, so patients should try to maintain emotional stability and quit smoking and drinking. It is important to note that patients should maintain a stable mood in daily life and avoid sudden emotional sadness and excessive excitement to avoid aggravating the disease.