What is a sign of severe hypoglycemia that may lead to coma?

Unconsciousness is a sign of severe hypoglycemia that indicates a critically low level of blood glucose. When the body does not have enough glucose to function properly, the brain can be significantly affected, leading to a loss of consciousness. This condition poses a serious health risk, as prolonged hypoglycemia can result in coma or even death if not addressed promptly.

While confusion, excessive hunger, and headaches can be symptoms associated with hypoglycemia, they are typically indicative of a less severe state. Confusion may occur as the brain's glucose supply starts to dwindle, but it does not reach the severity of unconsciousness. Excessive hunger often indicates the body's response to low blood sugar levels, while headaches can stem from various factors, including dehydration or withdrawal from food, rather than being a definitive sign of severe hypoglycemia. Thus, unconsciousness specifically denotes a critical and life-threatening situation that necessitates immediate treatment, making it the most concerning symptom in this context.