When diabetic patients experience dizziness after meals, it is more common for hypoglycemia to occur, because diabetes is more likely to occur after meals because of oral hypoglycemic drugs taken before meals or insulin injections before meals. The symptoms of hypoglycemia in many diabetic patients are not the typical hunger, sweating, hand trembling, etc. The atypical symptoms are dizziness, nausea, pallor, etc. Therefore, if a diabetic patient becomes dizzy after a meal, he or she must immediately test the fingertip blood sugar to see if hypoglycemia has occurred. If the fingertip blood glucose <4mmol/L is measured, there is hypoglycemia, and the patient should go to the hospital in time to adjust the treatment plan for lowering sugar.