A little high insulin is generally not serious, but the cause should be clarified. The causes of high insulin include eating, insulin resistance and type 2 diabetes. 1. Eating: The insulin peak will occur after 30-60 minutes of eating, and insulin in the body will be detected to be high at this time. 2. Insulin resistance: it refers to the decreased sensitivity of target organs to the action of insulin, causing the body to secrete more insulin to lower blood sugar, common causes include obesity, polycystic ovary syndrome and so on. 3. Type 2 diabetes: When long-term insulin resistance leads to a loss of compensation of the organism, there will be an increase in blood glucose, i.e. diabetes mellitus. The cause of high insulin should be clarified under the guidance of a doctor.