The symptoms of hand trembling when writing, caused by the following main causes: 1, too nervous, in a state of high tension or overworked can cause finger muscle spasms, the symptoms of finger trembling can also cause symptoms such as increased heart rate, red face. This is a psychological disorder, usually do a good job on psychological adjustment. 2, Parkinson’s syndrome is due to encephalopathy lesions caused by movement disorders mainly a disease, common clinical symptoms are memory loss, gait instability, panic gait, drunken gait, limb tremor, etc.. The symptoms of limb tremors can be aggravated when doing fine movements, and the tremors can disappear in the sleep state, which can cause severe activity disorders, etc. It is common in the elderly. 3. If the symptoms of hand tremors appear in the elderly, it is better to visit the neurology department of the hospital and check the cranial CT, etc.