1, Parkinson’s disease: If you are now about 50 years old, middle-aged people, while the emergence of uncontrollable shaking of one side of the hands and feet, and the shaking to the limb at rest when obvious, when the activity is reduced, then be highly alert to the possibility of Parkinson’s disease. The most typical manifestation of Parkinson’s disease is the movement of the thumb and index finger together 3-4 times per second, professionally known as “pill rolling”. At the same time, the disease may also appear with the prolongation of the disease, performance reduction, limb stiffness, reduced movement, walking instability and other symptoms. 2, idiopathic tremor: In contrast to Parkinson’s disease, if your tremor is obvious when the limb is moving, but decreases or disappears when it is stationary, and there are similar patients in your family, and if a small amount of alcohol can reduce the tremor, you should first suspect idiopathic tremor (also known as familial tremor and primary tremor). 3, hyperthyroidism: If you are shaking hands, accompanied by thinning, sweating, protruding eyes, rapid heartbeat and other symptoms, you should go to the hospital to perform timely serum thyroxine and thyroid ultrasound, because hyperthyroidism is also a common cause of limb tremors. 4, alcohol withdrawal symptoms: If you have a long history of heavy drinking, and you are in alcohol withdrawal for active or passive reasons, then your limb tremors may be a withdrawal symptom, the tremors are more generalized, coarser and accompanied by inattention, disorientation, mental abnormalities, hallucinations and other delusional performance. 5, cerebellar lesions: this type of patients can appear intentional tremor, the so-called intentional tremor refers to the patient about close to the target object, the tremor is about obvious. In addition, patients with cerebellar lesions may also have nystagmus, speech changes and ataxia such as unstable standing and walking. 6, psychogenic tremor: this kind of limb tremor tremor is mostly seen in middle-aged and elderly women, the most significant feature of this kind of tremor is a kind of episodic tremor, especially after the stimulation of adverse life events, can be reduced or stopped by itself after the emotional recovery. It should be emphasized that before diagnosing the disease, it is necessary to exclude all kinds of organic lesions caused by limb tremors. 7, drug tremor: many drugs can cause limb tremor, so you should read the drug instructions carefully before taking the drug, if the drug has side effects that cause extrapyramidal symptoms should be taken in strict accordance with the requirements of the doctor, and not to increase the dosage, discontinue and extend the course of medication without authorization. If such side effects occur due to the above-mentioned circumstances, there is no need to panic, and the drug can be gradually discontinued or replaced under the guidance of a doctor, and the symptoms can mostly stop on their own.