There are many causes of arm shaking, the most common clinical diseases are hyperthyroidism, Parkinson’s disease, idiopathic tremor, etc., as follows: 1, hyperthyroidism: this disease is most common in young female patients, at the same time, in addition to arm shaking will be accompanied by palpitations, panic and other symptoms, can be clarified through thyroid function monitoring; 2, Parkinson’s disease: common in middle-aged and elderly patients, in addition to Arm shaking is also accompanied by symptoms such as slow movement and increased muscle tone, which are mainly determined by clinician examination; 3, idiopathic tremor: idiopathic tremor is also a common clinical disease that causes arm shaking, which is characterized by a certain genetic tendency, and many patients’ parents or brothers and sisters will also have this phenomenon. No matter which disease causes arm tremors, it is advisable to go to the hospital so that the doctor can clarify the situation according to the situation.