What is Nocturnal Hypoglycemia?

Nocturnal hypoglycemia

It is also known as night time hypoglycemia. This condition causes a drop in the blood sugar levels when a person is asleep. It is common in diabetes patients who use insulin. Most people do not even realize that they have night time hypo until they have woken up. It is important for diabetes patients to be aware of the signs and symptoms of this condition in order to get timely treatment. People who use oral drugs to treat diabetes can also be affected by this condition. Read on to know more.


Nocturnal hypoglycemia symptoms include:

  • Headache when you wake up
  • Unexplained disturbance in your sleeping pattern
  • Lethargy and tiredness
  • Excessive sweating during the night

Dampness or sweating around the neck can also be an indicator of night time hypo.

Can children be affected by this condition?

Nocturnal hypoglycemia can occur in children with diabetes. This can be a cause of worry for the parents as their child may not be able to sleep properly or may exhibit other symptoms of this condition. Knowing about the causes and preventive measures that one can take can be helpful.


The causes of night time hypoglycemia can include the following:

  • Physical exertion or excessive physical activity during the day
  • Change in the eating pattern (not taking food or snacks on time)
  • Consumption of alcohol
  • High level of basal insulin
  • Prolonged period of sickness


The two basic steps for preventing nocturnal hypoglycemia are:

  • Decreasing the basal insulin
  • Having your food or snacks on time (or) having a snack before going to bed

Your doctor or healthcare team can provide more suggestions on changing your regimen.

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