The causes of dizziness and sweating in the elderly may be the following: 1. Consider that it may be a reaction to hypoglycemia, which can cause sudden dizziness and severe sweating, or even hypoglycemic encephalopathy, if the patient has a history of diabetes, a low diet or improper drug application. 2. 3, also consider the posterior circulation ischemia, because the elderly generally have atherosclerosis vascular stenosis, so when the blood vessel spasm cerebral blood flow supply is insufficient, resulting in patients appear violent dizziness, cold sweat, accompanied by may walk unsteadily, light-headed feeling.