The price of a box of insulin is around$100, and generally these medications are covered by health insurance and do not cause much financial stress to patients. Patients with advanced diabetes or other diseases that are complicated by diabetes, such as hypertension, hyperlipidemia or liver damage, need to stabilize their blood sugar through insulin injections. Therefore, regular purchase of insulin and regular injection of insulin can have the effect of maintaining blood sugar stability and avoiding blood sugar fluctuations. A box of insulin can last 1-2 weeks, and it should be injected regularly during the injection process to avoid hypoglycemia caused by high blood concentration. In addition, attention should be paid to avoid reuse of needles, otherwise it is easy to increase the pain when injecting insulin, and insulin should be purchased in hospitals or professional pharmacies.