The reason why the patient’s left hand is out of control is quite complicated, which may be caused by cerebral infarction, cerebral hemorrhage, transient ischemic attack, or because of cervical spondylosis, intracranial tumor, intracranial occupation. But in any case, when the above symptoms occur, patients must pay close attention to their own health, and timely consult the hospital to improve the relevant examination and treatment according to the patient’s condition.1. If the patient’s left hand does not respond to the call of the hand, it is considered to be an acute cerebrovascular disease, such as cerebral thrombosis or cerebral hemorrhage and other problems, which need to be actively diagnosed.2. If the patient’s left hand does not respond to the call of the hand and occurs under improper posture, it is considered to be the result of acute cerebral vascular disease. If the patient’s left hand doesn’t move, if it occurs under the condition of improper posture, it is considered to be caused by cervical spondylosis compressing the local blood vessels and nerves, and the patient can consult orthopedic department for corresponding examination and treatment.