Causes Of Low Blood Glucose
Low blood glucose is common for people with type 1 diabetes and can occur in people with type 2 diabetes taking insulin or certain medications. The average person with type 1 diabetes may experience up to two episodes of mild low blood glucose each week, and thats only counting episodes with symptoms. If you add in lows without symptoms and the ones that happen overnight, the number would likely be higher.
Symptoms Of Low Blood Sugar
How you react to low blood sugar may not be the same as how someone else with low blood sugar reacts. Its important to know your signs. Common symptoms may include:
If youve had low blood sugar without feeling or noticing symptoms , you may need to check your blood sugar more often to see if its low and treat it. Driving with low blood sugar can be dangerous, so be sure to check your blood sugar before you get behind the wheel.
You may not have any symptoms when your blood sugar is low . If you dont have symptoms, it will be harder to treat your low blood sugar early. This increases your risk of having severe lows and can be dangerous. This is more likely to happen if you:
- Have had diabetes for more than 5-10 years.
- Frequently have low blood sugar.
- Take certain medicines, such as beta blockers for high blood pressure.
If you meet one or more of the above and you have hypoglycemia unawareness, you may need to check your blood sugar more often to see if its low. This is very important to do before driving or being physically active.
Dont Drive When You Have Low Blood Sugar
Its dangerous. If youre driving and you have hypoglycemia symptoms, pull off the road, check your blood sugar, and eat a sugary food. Wait at least 15 minutes, check your blood sugar, and repeat these steps if needed. Eat a protein and carbohydrate source before you drive on. Be prepared. Keep a sugar source, such as glucose tablets, in your car at all times for emergencies.
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Treating Severely Low Blood Sugar
Blood sugar below 55 mg/dL is considered severely low. You wont be able to treat it using the 15-15 rule. You also may not be able to check your own blood sugar or treat it by yourself, depending on your symptoms. Make sure your family members, friends, and caregivers know your signs of low blood sugar so they can help treat it if needed.
Injectable glucagon is the best way to treat severely low blood sugar. A glucagon kit is available by prescription. Speak with your doctor to see if you should have a kit. Be sure to learn how and when to use it. Let family members and others close to you know where you keep the glucagon kit and make sure theyve been trained in how to use it too.
Its important to contact a doctor for emergency medical treatment immediately after receiving a glucagon injection. If a person faints due to severely low blood sugar, theyll usually wake up within 15 minutes after a glucagon injection. If they dont wake up within 15 minutes after the injection, they should receive one more dose. When the person is awake and able to swallow:
- Feed the person a fast-acting source of sugar .
- Then, have them eat a long-acting source of sugar .
Its also important that friends, family, co-workers, teachers, coaches, and other people you may be around often know how to test your blood sugar and treat severely low blood sugar before it happens.
If any of the following happens, your friend, relative, or helper should call 911:
What Causes Low Blood Glucose In People With Diabetes
Low blood glucose levels can be a side effect of insulin or some other medicines that help your pancreas release insulin into your blood. Taking these can lower your blood glucose level.
Two types of diabetes pills can cause low blood glucose
- sulfonylureas, usually taken once or twice per day, which increase insulin over several hours
- meglitinides, taken before meals to promote a short-term increase in insulin
The following may also lower your blood glucose level
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Preventing Low Blood Sugar Levels
Here are some other tips to help you avoid low blood sugar levels:
- Eat all your meals and snacks on time and try not to skip any.
- Take the right amount of insulin.
- If you exercise longer or harder than usual, have an extra snack.
- Don’t take a hot bath or shower right after an insulin shot.
- Stick to your diabetes management plan.
- Check your blood sugar levels regularly, so you can tell if your blood sugars are running too low and your treatment plan needs adjustment.
- Carry something containing sugar with you at all times and take it right away if you have symptoms. Don’t wait to see if the symptoms will go away they may get worse!
Alcohol and drugs can cause major problems with your blood sugar levels, so avoiding them is another way to prevent diabetes problems. Drinking can be particularly dangerous even deadly for people with diabetes because it messes up the body’s ability to keep blood glucose in a normal range. This can cause a very rapid drop in blood glucose in people with diabetes. Drug or alcohol use is also dangerous because it may affect someone’s ability to sense low blood sugar levels.
Learning how to recognize the signs of low blood sugar levels and get them back to normal is an important part of caring for diabetes. Keeping track of your blood sugar levels and recording lows when they occur will help you and your diabetes health care team keep your blood sugar levels in a healthy range.
How Can I Be Better Prepared For Hypoglycemia
You can take some steps to be ready for hypoglycemia:
- Be aware of the symptoms and treat them early.
- Carry some fast-acting carbs with you all the time.
- Check your glucose levels frequently, especially around meals and exercise.
- Inform family, friends and co-workers so they know what do if you need help.
- Talk to your healthcare provider regularly to make and update your plan.
- Wear a medical bracelet that lets people know you have diabetes. Carry a card in your purse or wallet with instructions for hypoglycemia.
A note from Cleveland Clinic
Hypoglycemia is quite common in people with diabetes. If not treated, it can cause troubling symptoms, and even serious health problems. Fortunately, you can avoid hypoglycemic episodes by monitoring your blood sugar. You can also make small adjustments to eating and exercising routines.
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How To Prevent Low Blood Sugar
This article was co-authored by Erik Kramer, DO, MPH. Dr. Erik Kramer is a Primary Care Physician at the University of Colorado, specializing in internal medicine, diabetes, and weight management. He received his Doctorate in Osteopathic Medicine from the Touro University Nevada College of Osteopathic Medicine in 2012. Dr. Kramer is a Diplomate of the American Board of Obesity Medicine and is board certified.There are 14 references cited in this article, which can be found at the bottom of the page.wikiHow marks an article as reader-approved once it receives enough positive feedback. In this case, 100% of readers who voted found the article helpful, earning it our reader-approved status. This article has been viewed 103,987 times.
Hypoglycemia, commonly referred to as “low blood sugar,” occurs when the amount of glucose in the blood falls below normal levels. Glucose is an important source of energy for the body. When your blood sugar level is too low, your brain cells and muscles do not have enough energy to function properly. Hypoglycemia can occur as a consequence of diabetes or as a reaction to a specific food eaten . It often results from a sudden drop in blood sugar levels. It can usually be treated quickly by eating a small amount of food containing glucose as soon as possible. Left untreated, hypoglycemia can cause confusion, headaches, fainting, and in more severe cases, seizures, coma, and even death.
How To Treat Someone Who’s Unconscious Or Very Sleepy
Follow these steps:
They may need to go to hospital if they’re being sick , or their blood sugar level drops again.
Tell your diabetes care team if you ever have a severe hypo that caused you to lose consciousness.
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What If The 15
If you dont feel better after three tries, or if your symptoms get worse, call your healthcare provider or 911. Healthcare providers can use a medication called glucagon. They inject it with a needle or squirt it up your nose. Glucagon is also available for home use. Your healthcare provider can prescribe it and teach a family member or friend how to use it in the event of severe hypoglycemia.
What Are The Signs And Symptoms Of Hypoglycemia
Hypoglycemia tends to present as a cluster of symptoms, and they often occur together. The most common signs of dangerously low blood sugar include:
Dizziness, disorientation, light-headedness, and an inability to think clearly
Hunger, especially if youve just eaten
Heightened irritability, confusion, and anxiety
Clamminess and sweating, with cold hands and feet
Drastic mood swings
If you have one or more of these symptoms contact your doctor.
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A Low Blood Sugar Level Without Diabetes
A low blood sugar level is uncommon in people who do not have diabetes.
Possible causes include:
- a gastric bypass
- other medical conditions, such as problems with your hormone levels, pancreas, liver, kidneys, adrenal glands or heart
- some medicines, including quinine
See a GP if you think you keep getting symptoms of a low blood sugar level. They can arrange some simple tests to check if your blood sugar level is low and try to find out what’s causing it.
Signs And Symptoms Of Low Blood Glucose
Each person’s reaction to low blood glucose is different. Learn your own signs and symptoms of when your blood glucose is low. Taking time to write these symptoms down may help you learn your own symptoms of when your blood glucose is low. From milder, more common indicators to most severe, signs and symptoms of low blood glucose include:
- Color draining from the skin
- Feeling weak or having no energy
- Blurred/impaired vision
- Tingling or numbness in the lips, tongue, or cheeks
- Nightmares or crying out during sleep
The only sure way to know whether you are experiencing low blood glucose is to check your blood glucose levels, if possible. If you are experiencing symptoms and you are unable to check your blood glucose for any reason, treat the hypoglycemia.
A low blood glucose level triggers the release of epinephrine , the fight-or-flight hormone. Epinephrine is what can cause the symptoms of hypoglycemia such as thumping heart, sweating, tingling, and anxiety.
If the blood sugar glucose continues to drop, the brain does not get enough glucose and stops functioning as it should. This can lead to blurred vision, difficulty concentrating, confused thinking, slurred speech, numbness, and drowsiness. If blood glucose stays low for too long, starving the brain of glucose, it may lead to seizures, coma, and very rarely death.
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The Causes Of Low Blood Sugar
Low blood sugar levels can happen to kids with diabetes because of the medicines they have to take. Kids with diabetes may need a hormone called insulin and/or diabetes pills to help their bodies use the sugar in their blood. These medicines help take the sugar out of the blood and get it into the body’s cells, which makes the level of sugar in the blood go down.
But sometimes it’s a tricky balancing act, and blood sugar levels can get too low. Kids with diabetes need to keep their blood sugar levels from getting too high or too low. How do they do it? With help from grown-ups, they keep three things in balance:
Each one of these can affect the other. For instance, eating more might mean a kid needs more insulin. And exercising might create the need for an extra snack. Again, a grown-up can help you learn how to juggle those three activities so you keep feeling good.
Some things that can make low blood sugar levels more likely to happen are:
- skipping meals and snacks
- not eating enough food at a meal or snack
- exercising longer or harder than usual without eating something extra
- getting too much insulin
- not timing the insulin doses properly with meals, snacks, and exercise
- taking a long bath or shower right after an insulin shot
How To Treat Someone Who’s Having A Seizure Or Fit
Follow these steps if someone has a seizure or fit caused by a low blood sugar level:
Tell your diabetes care team if you ever have a severe hypo that caused you to have a seizure or fit.
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How To Recognize Hypoglycemia
The first signs of hypoglycemia include feeling sweaty, shaky, and hungry. However, not everyone has these symptoms or notices them in time to prevent low blood sugar from getting worse. Its also important to know that your symptoms of hypoglycemia will change the longer you have T1D.
As hypoglycemia gets worse, symptoms can include:
- Having difficulty walking or seeing clearly
- Acting strange or getting disoriented
- Having seizures
Severe hypoglycemia may make you faint or pass out. This is dangerous if you are driving, climbing stairs, or doing other activities where you need to stay aware of things around you.
Hypoglycemia can happen at night. If it does, you are likely to wake up, but its important not to rely on your body to wake you up. A continuous glucose monitor, or CGM, can alert you and those around you with an alarm to let you know if your blood sugar starts getting low while you are sleeping.
Its a good idea to check your blood sugar often when lows are likely, such as in hot weather or when you travel. Your CGM can also let you know when your blood sugar is getting lower.
Watch out for hypoglycemia unawareness.
You might not have early warning signs of low blood sugar. This is called hypoglycemia unawareness, and it raises the risk of having severe lows. It is more likely if:
- You have had diabetes longer than 5 or 10 years
- You have frequent episodes of hypoglycemia
- You take certain medicines, such as beta blockers for high blood pressure
The Dangers Of Low Blood Glucose
At some time, most people with diabetes experience the sweating and shakiness that occurs when blood glucose levels fall below 70 mg/dl a condition known as hypoglycemia. The average person with type 1 diabetes may experience symptoms of low blood glucose up to two times a week. However, not all are aware that these symptoms can rapidly progress to seizures, coma and even death if hypoglycemia is severe. Though hypoglycemia can be common and occur repeatedly in some people with diabetes, symptoms of low blood glucose should always be taken seriously. People with diabetes and their families, friends or coworkers should be prepared to act quickly and responsibly at the earliest signs of low blood glucose.
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Tips To Prevent Blood Sugar From Dropping At Night
Hypoglycemia, also known as low blood sugar or low blood glucose, occurs when blood glucose levels drop below normalwhich is typically below a level of 70 milligrams per deciliter . With levels more commonly dipping at nighttime, otherwise referred to as nighttime hypoglycemia, this condition affects mostly patients with diabetes.
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Nighttime Low Blood Sugars
You may experience a low blood sugar night. The low blood sugar might wake you up and your symptoms might be similar to those you have during the day. However, the symptoms may be different. You might have nightmares, sleep poorly, perspire, or feel hot and cold. In the morning you may have a headache, feel nauseated, or feel confused. Notify your doctor if this happens. Check your blood sugar at the time you have the symptoms.
Treatment for a low blood sugar that occurs at night is the same as described earlier.
Your doctor may request that you check a 3:00 a.m. blood sugar 1 to 2 times per week in order to detect any low blood sugars during the night.
Disclaimer: This content is reviewed periodically and is subject to change as new health information becomes available. The information provided is intended to be informative and educational and is not a replacement for professional medical evaluation, advice, diagnosis or treatment by a health care professional.
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Check Your Blood Sugar Often
Regularly checking your blood sugar level can help you keep it in your target range. If youve had low blood sugar episodes in the past, you may want to check your blood sugar levels before driving or operating machinery.
Talk with your doctor about when and how often you should check your blood sugar.