What to Do When Your Blood Sugar is Dangerously Low (Hypoglycemia)
A sudden drop in blood sugar, clinically known as hypoglycemia, can be a disorienting and alarming event. This guide provides the essential, life-saving information you need to navigate it safely. We will outline the primary causes, detail the full spectrum of warning signs, and provide clear, step-by-step instructions on effective treatment, including the "Rule of 15," so you can confidently and correctly manage a hypoglycemic event and know when it’s time to seek emergency help.
Understanding Hypoglycemia: Causes, Symptoms & Treatment
Causes of Low Blood Sugar
Several factors can trigger hypoglycemia. These include:
- Medication: Taking too much insulin or certain oral diabetes medications.
- Skipped Meals: Not eating regularly can lead to a drop in blood sugar.
- Excessive Exercise: Physical activity without sufficient carbohydrate intake.
- Alcohol Consumption: Especially on an empty stomach, alcohol can interfere with the liver’s ability to release glucose.
- Certain Medical Conditions: Kidney or liver problems, and hormonal deficiencies can contribute.
Recognizing the Warning Signs
Hypoglycemia symptoms can vary from person to person. It’s crucial to recognize them early to prevent a more serious episode. Symptoms can be divided into mild, moderate, and severe.
- Mild Symptoms: Shakiness, sweating, dizziness, rapid heartbeat, hunger, irritability, anxiety, tingling in the lips or tongue.
- Moderate Symptoms: Confusion, difficulty concentrating, blurred vision, weakness, slurred speech.
- Severe Symptoms: Seizures, loss of consciousness, coma. This requires immediate emergency medical attention.
The "Rule of 15" – Your First Line of Defense

The "Rule of 15" is the standard treatment for mild to moderate hypoglycemia and is a straightforward, easily remembered method to bring your blood sugar back to a safe level.
- Test Your Blood Sugar: If possible, confirm your low blood sugar with a glucose meter.
- Consume 15 Grams of Fast-Acting Carbohydrates: Examples include:
- 4 ounces (1/2 cup) of juice or regular soda (not diet)
- 1 tablespoon of honey or sugar
- Glucose tablets (follow package instructions)
- Hard candies (about 3-4 pieces)
- Wait 15 Minutes: Allow the carbohydrates time to be absorbed into your bloodstream.
- Recheck Your Blood Sugar: After 15 minutes, test your blood sugar again.
- Repeat if Necessary: If your blood sugar is still below 70 mg/dL (or your target range), repeat the "Rule of 15" until your blood sugar reaches a safe level.
Important Considerations and Precautions
- Carry Fast-Acting Glucose: Always keep a source of fast-acting glucose readily available, especially if you are prone to hypoglycemia.
- Inform Others: Let family, friends, and coworkers know about your hypoglycemia and how to assist you in case of an emergency.
- Glucagon Emergency Kit: Individuals at risk of severe hypoglycemia should have a glucagon emergency kit prescribed by their doctor. Learn how to administer it and ensure others know how to use it.
- Medical Identification: Wear a medical identification bracelet or carry a card indicating you have diabetes and are prone to hypoglycemia.
- Regular Monitoring: Consistent blood sugar monitoring is essential for preventing hypoglycemia.
- Follow Your Doctor’s Instructions: Adhere to your prescribed medication regimen and dietary recommendations.
When to Seek Emergency Medical Attention
- Unconsciousness: If you lose consciousness, you need immediate medical assistance.
- Seizures: If you have a seizure, seek emergency medical care.
- Inability to Swallow: If you are unable to swallow or are at risk of choking, call for emergency help.
- Confusion or Disorientation: If you are severely confused or disoriented and unable to manage your blood sugar, seek immediate medical attention.
Disclaimer: This information is intended for general knowledge and informational purposes only, and does not constitute medical advice. It is essential to consult with a qualified healthcare professional for any health concerns or before making any decisions related to your health or treatment.