Left hand tremor should first see the neurology, most patients are due to neurological diseases, if the middle-aged and elderly may be Parkinson’s disease or Parkinson’s syndrome. Parkinson’s disease is a neurodegenerative disease, Parkinson’s syndrome is considered to be caused by multiple cerebral infarcts, the patient manifested as static hand tremor, at the same time there may be an increase in muscle tone, there can be a simultaneous increase in flexor and extensor tone, manifested as a lead pipe-like muscle straightness and gunshot-like straightness, there is a delayed movement, and in advanced stages, there may be postural and gait abnormalities, which can be manifested as a panicked gait. In young people it may also be hepatomegaly, which is a hereditary disease caused by a disorder of copper metabolism, and patients may have corneal K-F rings as well as abnormal liver function. It can also be present if the patient has hyperthyroidism, and liver and thyroid function tests are performed as necessary to clarify.