Diabetic hypoglycemia occurs when a person’s blood sugar level falls too low , typically below 70 mg/dL. Symptoms range from shakiness or jitteriness to severe confusion or seizures. Hypoglycemia often is due to too much insulin, missed meals, heavy exercise, or drinking alcohol. It can be prevented by regularly checking blood glucose levels, eating frequent meals, and carrying a fast-acting source of sugar to eat if your blood sugar drops. To treat an episode of hypoglycemia, consume 15 ... Hypoglycemia results in low blood sugar levels. It can happen in people with or without diabetes. Learn how to raise low blood sugar after a sudden drop. Hypoglycemia, or low blood sugar , occurs when glucose levels in the blood drop below 70 mg/dL, which can prevent the body from performing its typical functions. Symptoms can include shakiness,... Here are the most noticeable hypoglycaemia symptoms : Shakiness or Trembling: This is often the first sign that blood sugar is falling and the body needs energy quickly. Sweating: Cold, clammy skin or unexpected sweating without physical exertion is a key warning sign.