Pancreatic islet function is generally not fully restored after damage, pancreatic β-cell secretion of insulin, affected by genetic or environmental factors, pancreatic β-cell secretion of insulin decreased after damage to pancreatic islet function. The existing medical level cannot completely repair the islet function. Impaired pancreatic islet function may be caused by usual bad dietary habits, or it may be caused by viral infection, autoimmune damage and other factors. After the damage of pancreatic islet function, blood glucose often rises, which needs to be treated with hypoglycemic drugs as prescribed by the doctor after a clear diagnosis by a professional physician, which can be oral hypoglycemic drugs such as metformin, etc., or insulin injections, etc. as prescribed by the doctor. Pancreatic islet function damage should consult a professional physician for diagnosis and treatment.