Sudden dizziness, cold sweat is mainly seen in the following situations: 1, for young female patients, if suddenly appear dizziness, cold sweat, to ask whether there is a change in position, such as turning over, sitting up or lying down, dizziness, cold sweat, and even accompanied by nausea, vomiting and so on, consider that may be related to otoliths. 2, sudden dizziness, cold sweats, to ask the patient whether there are panic attacks, chest tightness, both previous There is no hypertension, diabetes, some patients with acute myocardial infarction mainly manifested as dizziness, sweating, then need to do electrocardiogram and cardiac enzyme examination to clarify. 3, sudden dizziness, cold sweat, ask the patient whether there is no previous low blood pressure, some patients in the blood pressure is too low, such as because of hyperthermia or diarrhea caused by insufficient blood volume, easy to postural hypotension, a sudden change in position will be dizziness, cold sweat, and the sudden change of position will occur. When there is a sudden change in body position, dizziness and cold sweat will occur.