There is no evidence that placing a magnet in the navel can treat diabetes, and patients are advised to take regular medication under the guidance of a doctor. The composition of the magnet is iron, cobalt, nickel, etc., diabetes is due to insulin secretion or utilization defects leading to elevated blood glucose, resulting in multi-system tissue and organ damage to the disease, and the two are not linked. Diabetes mellitus is currently treated with diet, exercise therapy and medication, and oral medications mainly include biguanides, α-glucosidase inhibitors, thiazolidinediones, and sulfonylureas, such as metformin and acarbose. Diabetic patients should go to the hospital in time and take scientific treatment measures under the guidance of doctors.