Hypoglycemia
Hypoglycemia, also known as low blood sugar, is a medical condition that occurs when the level of glucose in the blood falls below normal.
Definition and Classification
Hypoglycemia is defined as a blood glucose level below 70 mg/dL. It can be classified into several types, including:
- Fasting hypoglycemia: occurs when the body has not eaten for several hours
- Reactive hypoglycemia: occurs after eating, usually 1-3 hours after a meal
- Nocturnal hypoglycemia: occurs during sleep
- Hypoglycemia unawareness: a condition in which the body no longer produces symptoms of low blood sugar, making it difficult to detect
Causes and Risk Factors
Hypoglycemia can be caused by several factors, including:
- Medications, such as insulin and oral hypoglycemic agents
- Diabetes, particularly type 1 diabetes
- Other medical conditions, such as liver disease, kidney disease, and hypopituitarism
- Skipping meals or not eating enough carbohydrates
- Excessive physical activity without adequate food intake
- Certain medications, such as beta-blockers and salicylates
- Alcohol consumption, particularly in people with diabetes
Symptoms
The symptoms of hypoglycemia can vary from person to person, but common symptoms include:
- Shakiness or tremors
- Dizziness or lightheadedness
- Nausea and vomiting
- Rapid heartbeat
- Sweating
- Hunger
- Irritability or mood changes
- Confusion or difficulty concentrating
- Slurred speech
- Loss of coordination
- Seizures, in severe cases
Diagnosis and Treatment
Hypoglycemia is typically diagnosed using a blood glucose meter or laboratory tests. Treatment for hypoglycemia usually involves:
- Eating or drinking something that contains carbohydrates, such as glucose tablets, fruit juice, or candy
- Administering glucagon, a hormone that raises blood sugar levels, in severe cases
- Adjusting medication dosages or types, if necessary
- Eating regular meals and snacks to prevent low blood sugar
- Avoiding excessive physical activity without adequate food intake
Complications and Prevention
If left untreated, hypoglycemia can lead to serious complications, including:
- Seizures
- Coma
- Brain damage
- Death
To prevent hypoglycemia, it is essential to:
- Eat regular meals and snacks
- Monitor blood sugar levels regularly
- Adjust medication dosages or types as needed
- Avoid excessive physical activity without adequate food intake
- Wear a medical alert identification, such as a bracelet or necklace, to inform others of the condition in case of an emergency
Frequently Asked Questions (FAQs)
What is Hypoglycemia?
A condition where blood sugar levels are lower than normal.
What are the symptoms of Hypoglycemia?
Shaking, sweating, hunger, dizziness, palpitations, and confusion.
What causes Hypoglycemia?
May be caused by diabetes medication, excessive insulin, delayed meals, or certain medical conditions.
How is Hypoglycemia diagnosed?
Typically diagnosed with a blood glucose test.
Can Hypoglycemia be treated at home?
Mild cases can be treated at home with glucose tablets or food.
What foods are recommended to treat Hypoglycemia?
Fast-acting carbohydrates like glucose tablets, fruit juice, or candy.
How quickly should treatment for Hypoglycemia start working?
Symptoms typically improve within 15-30 minutes after treatment.
Can Hypoglycemia be prevented?
May be preventable with proper meal planning and medication management.
Are there any long-term effects of Hypoglycemia?
Repeated episodes may increase risk of cognitive impairment and other complications.
When should emergency medical help be sought for Hypoglycemia?
If symptoms are severe, or if the person is unconscious or unresponsive.
Article last updated on: 18th October 2025.
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