Good afternoon: Children and adults that do NOT have diabetes may develop higher blood sugars due to stress or illness. This is called stress induced hyperglycemia. (Keep in mind that blood sugars may be higher after eating as well). At our children's hospital, we occasionally encounter this situation in children who have high fevers, etc. In order to definitively rule out new onset diabetes in these situations, I obtain a hb A1c (I know you are familiar with this test). If the A1c is <6.0, I am usually comfortable that the child does not have new onset diabetes. On the other hand, sometimes a viral illness can trigger new onset diabetes. SO, in summary, I would simply obtain either a fasting or random laboratory blood sugar and a hb A1c to rule out new onset type 1 diabetes and confirm stress induced hyperglycemia. I hope this is helpful.
Also, for more in depth info read Dr. Cogan's post on hyperglycemia.
Dear Dr Cogan, Thank you so much for your quick reply. I monitored her today and her fasting BG was 71 and 2 hours post prandial (about 40 g of carbohydrates for breakfast) she had 105. I am still going to ask her physician to do a hemoglobin A1c just to be on the safe side since there is such a strong family history of diabetes in our family. Thanks again for sharing your expertise with all of us!
Mara: My pleasure. Keep us posted!