What Are Symptoms of Low Blood Sugar?

Low blood sugar, also called hypoglycemia, is a dangerous medical condition. If you don’t recognize the symptoms or regularly and vigilantly monitor your blood sugar level, you can quickly face serious and potentially fatal consequences.

Here is what you need to know, what to look for, and what to do about hypoglycemia to keep yourself healthy and avoid severe complications.

What Is Low Blood Sugar?

Our bodies require energy, and energy requires a steady, sufficient level of glucose in our blood. Hypoglycemia is generally diagnosed when blood glucose levels go below 70 mg/dL.

For some people, the lack of energy caused by low blood sugar manifests itself as general tiredness or fatigue. But, like any machine that requires energy, the body can stop performing essential functions or cease working altogether if blood levels remain extremely low or continue to fall. This can cause seizures, unconsciousness, or even a coma.

Symptoms To Look For

If you experience any of the following symptoms on a regular basis, you should consult with a physician who can evaluate you, measure your blood glucose level, and recommend a course of treatment:

  • Heart palpitations
  • Irritability
  • Hunger
  • Fatigue
  • Sweating
  • Headache
  • Confusion
  • Nausea
  • Difficulty speaking
  • Shaking

Continuous Glucose Monitoring Makes It Easy To Avoid Low Blood Sugar Complications

Blood sugar levels go up and down throughout the day, especially after meals, exercise, or when under stress. That is why regularly checking blood sugar levels is so important for people with hypoglycemia.

Traditionally, checking blood sugar levels involved the use of a glucometer. But meters, as they are also called, require the user to prick their finger to get a blood sample and do so multiple times a day.

Understandably, many folks don’t look forward to regularly causing themselves discomfort. Nor do people with diabetes enjoy breaking up their day or stopping whatever they’re doing to draw blood and put it on a test strip.

Continuous Glucose Monitoring (CGM) is the alternative that people living with diabetes have been looking for. CGM is a proven, approved, and easy-to-use transceiver device that provides real-time glucose readings every few minutes through a tiny sensor underneath the skin. This sensor measures your interstitial glucose level and then sends the data to a pager-like monitor or an app on your smartphone. An alarm will sound if your blood sugar becomes too high or too low.

With easy-to-use features that can help each person proactively record and track glucose levels—as well as provide valuable insights on data that helps manage exercise, meals, and daily health status—CGM is a game-changer for individuals with diabetes.

If you have recently received a diagnosis of diabetes, ask your doctor about CGM and contact us today to see if you qualify for CGM and access our guide to continuous glucose monitoring.


If you are not insured, or have a high deductible health insurance plan, you can still purchase the Freestyle Libre Reader and Sensors at extremely competitive prices. Prices starting as low as $99 per month

*Fingersticks are required for treatment decisions when you see Check Blood Glucose symbol, when symptoms do not match system readings when you suspect readings may be in accurate, or when you experience symptoms that may be due to high or low blood glucose.

Reference 1: Data on file. Abbott Diabetes Care. 2, FreeStyle Libre 14 day User’s Manual

Indications and Important Safety Information

FreeStyle Libre and FreeStyle Libre 14 day Flash Glucose Monitoring systems are continuous glucose monitoring (CGM) devices indicated for replacing blood glucose testing and detecting trends and tracking patterns aiding in the detection of episodes of hyperglycemia and hypoglycemia, facilitating both acute and long-term therapy adjustments in persons (age 18 and older) with diabetes. The systems are intended for single patient use and require a prescription.

CONTRAINDICATIONS: Remove the sensor before MRI, CT scan, X-ray, or diathermy treatment.

WARNINGS/LIMITATIONS: Do not ignore symptoms that may be due to low or high blood glucose, hypoglycemic unawareness, or dehydration. Check sensor glucose readings with a blood glucose meter when Check Blood Glucose symbol appears, when symptoms do not match system readings, or when readings are suspected to be inaccurate. The system does not have alarms unless the sensor is scanned, and the system contains small parts that may be dangerous if swallowed. The system is not approved for pregnant women, persons on dialysis, or critically-ill population. Sensor placement is not approved for sites other than the back of the arm and standard precautions for transmission of blood borne pathogens should be taken. The built-in blood glucose meter is not for use on dehydrated, hypotensive, in shock, hyperglycemic-hyperosmolar state, with or without ketosis, neonates, critically-ill patients, or for diagnosis or screening of diabetes. When using FreeStyle LibreLink app, access to a blood glucose monitoring system is required as the app does not provide one. Review all product information before use or contact Abbott Toll Free (855-632-8658) or visit www.freestylelibre.us for detailed indications for use and safety information.html. . FreeStyle, Libre, and related brand marks are trademarks of Abbott Diabetes Care Inc. in various jurisdictions. Other trademarks are the property of their respective owners. ©2018 Abbott. ADC-09691 vLO 10/18

*The FreeStyle LibreLink app and the FreeStyle Libre 14 day reader have similar but not identical features. Fingersticks are required for treatment decisions when you see Check Blood Glucose symbol, when symptoms do not match system readings, when you suspect readings may be inaccurate, or when you experience symptoms that may be due to high or low blood glucose.

The FreeStyle Libre 2 app and the FreeStyle Libre 2 reader have similar but not identical features. Fingersticks are required for treatment decisions when you see Check Blood Glucose symbol and when your glucose alarms and readings from the system do not match symptoms or expectations

‡‡‡Based on the sensor being replaced once every 14 days, and scanned at least once every 8 hours.

§§§Glucose readings are not available during 1-hour warm-up, when sensor is too hot or too cold, when you see an error or "LO" or "HI" message, or no current glucose reading