Hypoglycemia occurs when blood sugar levels fall too low, depriving the body and especially the brain of its main energy source. A blood glucose level under 70 mg/dL is generally considered hypoglycemic. Common signs include trembling, sweating, hunger, fatigue, mood changes, and blurred vision. If not treated quickly, more serious symptoms like confusion, fainting, or seizures can develop. While hypoglycemia is most frequently seen in people with diabetes who take insulin or certain medications, it can also happen due to skipping meals, excessive physical activity, drinking alcohol without food, or specific health conditions. Managing hypoglycemia involves quickly raising blood sugar by eating or drinking something sugary, and in more severe cases, receiving medical treatment. Preventing it requires regular eating patterns, proper medication management, and monitoring blood glucose levels when needed.