Best Dr. Norwood
If you have type 1 (insulin dependent diabetes which is due to auto immunity) you do have a higher chance of developing auto immune hyperthyroidism as well as other autoimmune disorders. In type 2 diabetes, there is no connection with hyperthyroidism except that it can worsen diabetes if the hyperthyroid condition develops. Hypothyroidism due to its effect on metabolism, e.g., weight gain, effect on insulin secretion can lead to diabetes.
Marvin A. Leder, MD FACP FACE