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Patient guide · Diabetes · 1 min read

Low Blood Sugar

Answers to common questions about low blood sugar.

Questions on this page
  1. What is hypoglycaemia?
  2. What are the symptoms of low sugar?
  3. What should I do when my sugar is low?
  4. Can low sugar happen during sleep?

What is hypoglycaemia?

Hypoglycaemia means blood glucose is below 70 mg/dL.

It is particularly important in people taking insulin or certain glucose-lowering medicines. Diabetes Journals Reference

What are the symptoms of low sugar?

Sweating

Shaking

Hunger

Palpitations

Dizziness

Weakness

Confusion

Behavioural changes

What should I do when my sugar is low?

If you are conscious and able to swallow, take a fast-acting source of glucose and recheck your glucose after about 15 minutes.

Severe hypoglycaemia requiring help from another person is a medical emergency.

Can low sugar happen during sleep?

Yes.

Nocturnal hypoglycaemia can occur, particularly in people using insulin or certain other medicines.

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