Hypoglycemia and Low Blood Sugar | Symptoms & Causes
What are the symptoms of hypoglycemia?
While each child may experience symptoms of hypoglycemia differently, the most common include:
- Shakiness
- Dizziness
- Sweating
- Hunger
- Headache
- Irritability
- Pale skin color
- Sudden moodiness or behavior changes, such as crying for no apparent reason
- Clumsy or jerky movements
- Difficulty paying attention or confusion
What causes hypoglycemia?
The vast majority of episodes of hypoglycemia in children and adolescents occur when a child with diabetes takes too much insulin, eats too little, or exercises strenuously or for a prolonged period of time.
For young children who do not have diabetes, hypoglycemia may be caused by:
Single episodes:
- Stomach flu or another illness that may cause them to not eat enough
- Fasting for a prolonged period of time
- Prolonged strenuous exercise and lack of food
Recurrent episodes:
- Accelerated starvation, also known as “ketotic hypoglycemia,” a tendency for children without diabetes, or any other known cause of hypoglycemia, to experience repeated hypoglycemic episodes
- Medications your child may be taking
- A congenital (present at birth) error in metabolism or unusual disorder such as hypopituitarism or hyperinsulinism
Hypoglycemia and Low Blood Sugar | Diagnosis & Treatments
How is hypoglycemia diagnosed?
If your child has diabetes, hypoglycemia is usually caused by insulin reaction, a common complication of diabetes. For children who have symptoms of hypoglycemia and don’t have diabetes, in addition to a complete medical history and physical exam, your child’s physician will look for evidence of what’s known as the Whipple Triad:
- Symptoms known or likely to be caused by hypoglycemia
- Low plasma glucose measured at the time of the symptoms
- Relief of symptoms when glucose is raised to normal
The doctor also may order laboratory tests to measure your child’s insulin production.
How is hypoglycemia treated?
Children with hypoglycemia have different symptoms, and these vary from one child to another. But no matter what your child’s symptoms, the overriding goal is the same — to bring the blood sugar back up to normal as rapidly as possible and return your child to good health.
Most often, your child’s blood sugar can be brought back up to normal by eating or drinking something that has sugar in it, such as fruit juice, regular soda, table sugar, maple syrup, candy, glucose tablets, glucose gel, or cake frosting. Consider encouraging your child to:
- Eat regular meals throughout the day
- Eat frequent snacks
For children with diabetes, the goal is to consistently maintain a blood sugar level that is in a healthy range. This involves testing blood sugar often, learning to recognize the earliest symptoms of low blood sugar, and treating the condition quickly, based on instructions given by your child's healthcare providers.
If your child has recurrent or severe hypoglycemia, the first thing is to determine the cause, because different causes have different treatments. While the cause is determined, some children will receive glucose intravenously (through an IV) in the hospital to make sure their blood-sugar level stays normal.
Some causes of hypoglycemia can be treated with changes in your child’s diet or medication. For some rare cases of severe hypoglycemia that don’t respond to medical treatment, the doctor may recommend surgery to remove most of the pancreas.
How we care for hypoglycemia
At Boston Children’s Hospital, we treat hypoglycemia in our Division of Endocrinology, a multi-disciplinary program dedicated to the treatment of a wide range of endocrinological disorders. Caring for more than 7,000 patients each year, our division is one of the largest pediatric endocrinology practices in the country. We provide state-of-the-art diagnosis, treatment, and clinical management for children with hypoglycemia and related disorders.
