D.W.
The most common symptoms of diabetes are increased thirst, hunger and urination.
I sold insulin and diabetes medications for 8 years, so I hope I can help you
There are 2 kinds of diabetes -
type 1 (used to be called juvenile onset) in which the pancreas produces little to no insulin
type 2 (used to be called adult onset) in which the body can either not produce enough insulin or can not use it effectively (may be controlled through diet/exercise, oral medications or insulin)
Hypoglycemia (low blood sugar) is different from diabetes (high blood sugar)
People who experience symptoms of reactive hypoglycemia may develop diabetes, but hypoglycemia is not, itself, a diagnosed condition.
Her doctor can easily run simple blood tests that will confirm diabetes. There is NO such thing as "borderline" diabetes. You either do or do not have diabetes. If you get her tested, please find out what the numbers are. A diagnosis can be confirmed with a fasting blood sugar (FPG) of 126 or higher. It can also be diagnosed by a 2 hour post-prandial (you drink a high-sugar drink and test the blood 2 hours later) of 180 or higher, or a new standard from the American Diabetes Association is an A1c (test to determine the average blood sugar over a 3 month period) of greater than 6.5%
If she does have diabetes, there are MANY resources available. She will likely be referred to an endocrinologist because of her age (especially if type 1 is diagnosed). Meeting with a Diabetes Educator and a Dietician will be really important as well
I'd recommend visiting the websites of Sanofi-Aventis, Eli Lilly, Novo Nordisk, etc. They all have excellent information about Diabetes to help educate you (this information is disease related and not specific to medications made by the companies).
There's a lot of bad information out there (such as sugar free products being OK for people with diabetes), so I'd highly recommend taking advantage of all the free resources available for patient information.
I hope this helps. Feel free to reach out if you have other questions. I no longer work for any of these companies, but Diabetes is very near and dear to me, and I'd be more than happy to help if needed.