Hypoglycemia in Children
What is hypoglycemia?
Hypoglycemia is when the level of sugar (glucose) in the blood is too low. Glucose
is the main source of fuel for the brain and the body. The normal range of blood glucose is
about 70 to 140 milligrams per deciliter (mg/dL). The amount blood differs based on
the most recent meal. Babies and small children with type 1 diabetes will have different
goal ranges of blood glucose levels.
What causes hypoglycemia?
Hypoglycemia can be a condition by itself. Or it can be a complication of diabetes
or other disorder. It’s most often a problem in someone with diabetes. It occurs when
there’s too much insulin. This is also called an insulin reaction.
Causes in children with diabetes may include:
- Too much insulin or oral diabetes medicine
- The wrong kind of insulin
- Incorrect blood-glucose readings
- A missed meal
- A delayed meal
- Not enough food eaten for the amount of insulin taken
- More exercise than usual
- Diarrhea or vomiting
- Injury, illness, infection, or emotional stress
- Other health problems, such as celiac disease or an adrenal problem
- Conditions that cause too much insulin in the body (hyperinsulinism)
- Tumor on the pancreas that makes insulin (insulinoma)
- Taking diabetes medicine called sulfonylurea
- Congenital problems with metabolism
- Rare genetic disorders
Hypoglycemia may also occur in these cases:
- After strenuous exercise
- During period of time not eating food (fasting)
- When taking certain medicines
- After abusing alcohol
Who is at risk for hypoglycemia?
The biggest risk factor is having type 1 diabetes.
What are the symptoms of hypoglycemia?
Symptoms can occur a bit differently in each child. They can include:
- Pale skin
- Sudden moodiness or behavior changes, such as crying for no reason
- Clumsy or jerky movements
- Trouble paying attention
- Tingling feelings around the mouth
The symptoms of hypoglycemia can be like other health conditions. Make sure your child
sees his or her healthcare provider for a diagnosis.
How is hypoglycemia diagnosed?
The healthcare provider will ask about your child’s symptoms and health history. He
or she may also ask about your family’s health history. He or she will give your child
a physical exam. Your child may also have blood tests to check blood sugar levels.
When a child with diabetes has symptoms of hypoglycemia, the cause is most often an
For children with symptoms of hypoglycemia who don’t have diabetes, the healthcare
- Measure levels of blood sugar and different hormones while the child has symptoms
- See if symptoms are relieved when the child eats food or sugar
- Do tests to measure insulin action
Your child may need to do a supervised fasting study in the hospital. This lets healthcare
providers test for hypoglycemia safely.
How is hypoglycemia treated?
Treatment will depend on your child’s symptoms, age, and general health. It will also
depend on how severe the condition is.
For children with diabetes, the goal of treatment is to maintain a safe blood glucose level.
This is done by:
- Testing blood glucose often
- Learning to recognize symptoms
- Treating the condition quickly
To treat low blood glucose quickly, your child should eat or drink something with
sugar such as:
- Orange juice
- Cake icing
- A hard candy
This should be followed by eating food with complex carbohydrates, fat, and protein.
A good example is a peanut butter sandwich on whole-grain bread.
Blood glucose levels should be checked every 15 to 20 minutes until they are above
If hypoglycemia is severe, your child may need a glucagon injection. Talk with your
child’s healthcare team about this treatment.
What are possible complications of hypoglycemia?
The brain needs blood glucose to function. Not enough glucose can impair the brain's
ability to function. Severe or long-lasting hypoglycemia may cause seizures and serious
Can hypoglycemia be prevented?
Not all episodes of hypoglycemia can be prevented. Most children with type 1 diabetes
will have hypoglycemia. But you can help prevent severe episodes by:
- Testing your child’s blood glucose often
- Recognizing symptoms
- Treating the condition quickly
Other ways to minimize or prevent hypoglycemia include making sure your child:
- Takes medicines at the right time
- Eats enough food
- Doesn’t skipping meals
- Checks blood glucose before exercising
- Eats a snack if needed
Living with hypoglycemia
Children with type 1 diabetes or other conditions that may cause hypoglycemia need
to follow their care plan. It’s important to test blood glucose often, recognize symptoms,
and treat the condition quickly. It is also important to take medicines and eat meals
on a regular schedule.
Work with your child's healthcare provider to create a plan that fits your child's
schedule and activities.
When should I call my child's healthcare provider?
Call your child’s healthcare provider if your child:
- Has hypoglycemia often
- Has moderate to severe episodes of hyperglycemia
Key points about hypoglycemia
- Hypoglycemia occurs when the blood glucose is too low to fuel the brain and the body.
- It may be a condition by itself, or may be a complication of diabetes or another disorder.
- To treat low blood glucose right away, your child should eat or drink something with
sugar, such as orange juice, milk, cake icing, or a hard candy.
- Severe or long-lasting hypoglycemia may result in seizures and serious brain injury.
Tips to help you get the most from a visit to your child’s health care provider:
- Before your visit, write down questions you want answered.
- At the visit, write down the names of new medicines, treatments, or tests, and any
new instructions your provider gives you for your child.
- If your child has a follow-up appointment, write down the date, time, and purpose
for that visit.
- Know how you can contact your child’s provider after office hours. This is important
if your child becomes ill and you have questions or need advice.