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Hypoglycaemia, or a "hypo", is when your blood sugar (glucose) level is too low to provide your body with enough energy to carry out its activities.
Symptoms of hypoglycaemia
The symptoms of hypoglycaemia usually begin when a person's blood glucose level drops to somewhere between 3 and 4 millimoles per litre (mmol).
Causes of hypoglycaemia
In most cases hypoglycaemia occurs in people with diabetes, although in rarer cases it can occur because of other underlying conditions.
Treating hypoglycaemia
In most cases, hypoglycaemia can be self-treated when you recognise the symptoms.
Preventing hypoglycaemia
If you have diabetes, sticking to your medication plan and eating regular meals can help prevent hypoglycaemia.