Dizziness and cold sweat for no reason may be physiological factors such as tension, neurological disorders, cardiovascular diseases, endocrine diseases, etc.. 1. Physiological factors: normal people suddenly appear dizziness, cold sweat, may be due to mental tension, anxiety, excitement, or environmental temperatures and other causes. 2. Neurological diseases: sudden dizziness, cold sweat, if accompanied by visual rotation, nausea, vomiting, numbness and weakness of the limbs and other symptoms, may suggest that there is a neurological disease, and should be promptly to the Department of Neurology. 3. Cardiovascular and cerebrovascular diseases: such as hypotension, due to low blood pressure, insufficient cerebral perfusion, causing sudden dizziness, cold sweat, black haze and so on. 4. Endocrine diseases: such as hypoglycemia, there will be pale face, dizziness, cold sweat, panic and other symptoms. It is necessary to test blood sugar in time to clarify the cause. Sudden dizziness, cold sweat exclude physiological factors caused by the person, should consult a doctor in a timely manner, a clear diagnosis, reasonable treatment, in order to avoid delaying the condition.