Tremor is a clinical symptom of alternating, rhythmic contraction and diastole of human muscles under the influence of physiological factors or diseases, which may be caused by physiological factors or diseases. In addition, nystagmus may also occur. In normal people, when the hands are stretched forward with force, a slight and rapid tremor will occur. In addition, when normal people are under stress, anxiety, anger and other excited emotions, the symptoms of nystagmus will also appear. In addition to physiological factors, unexplained tremor is usually due to disease, a common clinical cause of Parkinson’s disease, which not only causes patients to have tremor, but also muscle tonus, bradykinesia and other symptoms. At the same time, patients with idiopathic tremor, cerebellar tremor and other diseases may also experience tremor of the limbs. Some patients may also have nystagmus, which is an involuntary, rhythmic, back-and-forth eye movement that may be caused by visual system abnormalities, vestibular abnormalities or central abnormalities. It is recommended that patients with significant symptoms of tremor seek prompt medical attention to evaluate their condition and follow the doctor’s instructions for treatment.