Similar to a car needs fuel to run, your body and brain need a constant supply of sugar (glucose) to function properly.
The bodies of people with hypoglycemia (low blood sugar) don't have enough sugar to use as fuel. It can happen for several reasons, including diet, some medications and conditions, and exercise.
Most people feel symptoms of hypoglycemia when their blood sugar is 70 milligrams per deciliter (mg/dL) or lower.
If glucose levels become too low, as occurs with hypoglycemia, early symptoms include:
- Confusion
- Dizziness
- Feeling shaky
- Hunger
- Headaches
- Irritability
- Pounding heart; racing pulse
- Pale skin
- Sweating
- Trembling
- Weakness
- Anxiety
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