Not all insulin needs to be kept inside the refrigerator, insulin that has been opened and is being used can be kept at room temperature, which is defined as no more than 30 degrees. If it is a new insulin that has not been used, it is best to keep it in the refrigerator at 2-8 degrees Celsius. Insulin placed in the refrigerator must be careful not to freeze and should only be placed in an upper chilled environment. If the insulin freezes, it is strictly forbidden to use it again. Insulin is a high-risk drug used to control blood glucose, and its use and dosage adjustment must be guided by a doctor. It is strictly forbidden to increase the dosage of insulin by yourself, so as to avoid serious hypoglycemia. It is also not allowed to reduce the dosage and stop using it randomly, so as not to cause acute metabolic disorders of diabetes, such as diabetic ketoacidosis. When you have diabetes, you should choose the appropriate hypoglycemic drugs according to the level of blood glucose, the state of pancreatic islet function, the level of glycated hemoglobin, and the situation of complications.