The temperature for long-term storage of insulin is refrigerated 2-8°C. Insulin is an effective method of blood sugar control for diabetic patients, and the use of insulin must be carried out under the guidance of a doctor, and patients are not recommended to buy insulin subcutaneously on their own. Insulin is a special medicine that must be stored and transported in a special way. Insulin can be kept at a constant temperature of 2-8℃ until the shelf life on the box, and care should be taken to prevent insulin from freezing during the process of refrigerated storage of insulin. Insulin that has been opened and is in use can be stored for 4 weeks at room temperature below 25℃ without being placed in the refrigerator. If you have to put the insulin in use in the refrigerator, you should take it out half an hour in advance and put it at room temperature before subcutaneous injection after half an hour to prevent the absorption of insulin and aggravate the irritation of the injection site.