High blood sugar, or hyperglycemia, happens when your body doesn’t produce enough insulin, or it can’t properly use the insulin it makes. insulin is the hormone that regulates the amount of sugar.
Warning signs occur when your blood sugar drops below 70 mg/dl. when this happens, your body releases hormones like glucagon and epinephrine to increase your blood sugar. this causes warning signs like a racing heart, sweats, and tremors. these warnings are your body’s way of telling you to get more sugar into your system quickly. .