Most people with a blood sugar level under 40 mg/dL will have symptoms. These include:

- Episodes of feeling warm, sweaty and "out of touch"

- Unexplained episodes of heavy sweating

- Extreme hunger at unexpected times

- Feeling shaky and lightheaded

- Difficulty concentrating

Maybe you mentioned these symptoms to your doctor and that is why you had this blood test.

Why was the blood glucose test performed?

It was part of a routine blood panel.

My doctor was concerned about my symptoms.

I am not sure why the blood sugar test was done.