Boom Animation on Instagram: "Low Blood Sugar Explained (Even if You're Not Diabetic) . . Low blood sugar, or hypoglycemia, happens when glucose levels in your blood drop too low, starving your brain of its main energy source. This can cause shakiness, dizziness, irritability, and intense hunger. While common in people with diabetes, it can also happen to anyone. This is often called reactive hypoglycemia, where eating a high-sugar meal causes an insulin spike that overcorrects and drops your bl