Hand shaking on its own may be caused by excessive fatigue, Parkinson’s disease, idiopathic tremor, hyperthyroidism and other reasons. 1. Excessive fatigue: Occasional shaking of the hands and upper limbs on their own may be caused by excessive fatigue of the upper limbs, such as playing soccer for a long time, stir-frying, lifting heavy objects, and so on. After a period of rest, the symptoms will disappear. So there is no need to be overly nervous about occasional hand tremors. If the hand tremor persists, you need to go to the hospital to clarify the cause. 2. Parkinson’s Disease: Patients will have a resting tremor of the fingers, which shakes a lot when they write with their hands, hold chopsticks, fasten buttons and other actions. 3. Idiopathic tremor: It is a common cause of hand tremor in middle-aged and elderly people, and is often accompanied by head and neck shaking, but there is no slow movement or stiffness of the limbs. 4. Hyperthyroidism: this type of patients with increased neuromuscular excitability, also prone to hand tremor, insomnia and nervousness. Hand shaking on its own may also be caused by other reasons, it is recommended that patients go to the hospital in a timely manner, to clarify the cause of the disease, and active treatment.