Guangdong reader Mr. Yang asked: My partner is 55 years old and was found out to have type 2 diabetes in October last year, she has been taking insulin for half a year, but her blood glucose can’t come down. Shen Jie, Director of the Department of Endocrinology and Metabolism of the Third Affiliated Hospital of Southern Medical University, replied: There is no relationship between the failure to lower blood glucose and sweating. The reason that the patient sweats more after exercise may be that the patient is not sweating after exercise alone, but because of the hypoglycemic reaction after exercise. According to the above information, the patient’s blood glucose does not come down after insulin injection, most likely due to not eating after insulin injection in the morning on an empty stomach, coupled with prolonged exercise, the risk of hypoglycemia increases, which in turn leads to an increase in eating and a significant increase in blood glucose by rebound. Therefore, even if insulin is injected, no effect is seen. Patients should be reminded that while the dose of insulin is important, the correct injection method and injection time are also important. In addition, the older you are, the higher the risk of hypoglycemia. Elderly diabetic patients should control high blood sugar and prevent hypoglycemia, especially when applying insulin therapy, it is recommended that the best time for patients to exercise is 0.5 to 1 hour after meals. Patients are advised to visit the endocrinology clinic in time to clarify the specific reasons why their blood glucose does not come down, follow medical advice to improve their diet and exercise routine, and adjust their drug doses.