Symptoms and Complications
When blood glucose falls too low, the body releases adrenaline. This produces symptoms similar to anxiety such as nervousness, sweating, faintness, fast heartbeat, tingling, nausea, trembling, and sometimes hunger. If the brain can't get enough glucose, you will feel weak, dizzy, tired, drowsy, and confused, and you may have a headache and trouble concentrating, speaking, or seeing clearly. You may act in ways that make people think you're drunk. Severe hypoglycemia can also lead to seizures and coma, and prolonged hypoglycemia can lead to brain damage.
Hypoglycemic symptoms can come on gradually or can appear suddenly and cause confusion or panic within a few minutes.