Hypoglycemia, also known as low blood sugar, is a condition where the level of glucose in the blood is unusually low. Glucose plays a vital role in providing energy to the body, especially for the brain. Typically, blood sugar levels in a fasting state range from 70 to 100 mg/dL. If blood sugar levels drop below 70 mg/dL, it is usually diagnosed as hypoglycemia. Episodes of low blood sugar can happen to people with diabetes, as well as those without the condition. However, it is more frequently experienced by individuals who are managing their diabetes with insulin or other medications that raise insulin levels.