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What Can Cause Low Blood Sugar


The Effects Of Low Blood Sugar On Your Body

Low Blood Sugar

Every cell in your body needs energy to function. The main source of energy might come as a surprise: Its sugar, also known as glucose. Blood sugar is essential to proper brain, heart, and digestive function. It even helps keep your skin and vision healthy.

When your blood sugar levels fall below the normal range, its called hypoglycemia. There are many identifiable symptoms of low blood sugar, but the only way to know if you have low blood sugar is by taking a blood glucose test.

Learn more about the symptoms of low blood sugar, as well as the long-term effects on the body.

most common reasons for low blood sugar are some medications used to treat diabetes, such as insulin.


In type 1 diabetes, the pancreas can no longer produce insulin. In type 2 diabetes, the pancreas doesnt make enough insulin, or your body cant use it properly. Too much insulin or oral diabetic medication can lower the blood sugar level, leading to hypoglycemia.

However, contrary to popular belief, low blood sugar isnt exclusive to diabetes, though it is rare. It can also happen if your body makes more insulin than it should.

Another possible cause of low blood sugar is drinking too much alcohol, especially over long periods of time. This can interfere with the livers ability to create a buildup of glucose and then release it into your bloodstream when you need it.

Other causes include:

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
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Your Diabetes Devices And Hypoglycemia

Several insulin pumps are now available that make managing blood sugar levels easier, particularly when connected to a glucose meter or a CGM.

Some of the most important advantages of CGM devices are the improved insulin control and the ability to detect trends and lows early. With improved technology, it is now possible for parents to track blood sugar trends in their kids even when they are hundreds of miles apart .


In addition, automated insulin delivery systems, also known an artificial pancreas or a hybrid closed-loop system, will automatically adjust insulin to match your bodys need to help you spend more time in your target range.

Resources that provide people with T1D and their families with more detailed information about pumps and CGM devices are available through JDRF here. For people looking for a deeper understanding of technology that helps people with T1D better manage their blood sugar, JDRF resources are available here.

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How Are Low Blood Sugar Levels Treated

When blood sugar levels are low, the goal is to get them back up quickly. Most kids who have low blood sugar need to:

  • eat, drink, or take something that contains sugar that can get into the blood quickly. Your mom or dad may give you really sugary foods or drinks, like regular soda, orange juice, cake frosting, glucose tablets, or glucose gel
  • wait about 10 minutes to let the sugar work
  • recheck their blood sugar levels with a blood glucose meter to see if the levels are back to normal

Sometimes, blood sugar levels can get very low and you might not feel well enough or be awake enough to eat or drink something sugary. When this happens, kids need to get a glucagon shot. Glucagon is a hormone that helps get your blood sugar level back to normal very quickly. Your doctor and diabetes health care team can tell you if you need to keep these shots on hand and will help you and your parents understand when it’s necessary to use one.


Your parents and other grown-ups who take care of you should know how to give glucagon shots. If you don’t have a glucagon shot or the person you’re with doesn’t know how to use one someone should call 911.

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What Are Clinical Trials For Low Blood Glucose

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Clinical trialsand other types of clinical studiesare part of medical research and involve people like you. When you volunteer to take part in a clinical study, you help doctors and researchers learn more about disease and improve health care for people in the future.

Researchers are studying many aspects of low blood glucose levels in diabetes, such as

  • how to diagnose and treat low blood glucose among people with diabetes
  • medicines that can treat symptoms of low blood glucose in people with hypoglycemia unawareness
  • educational approaches to reduce fear of low blood glucose, which can make it harder for you to control your diabetes

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Low Blood Sugar And Nausea

Whether people have diabetes or not, when they have mild low blood sugar, they may feel extremely hungry, often also nauseated. This symptom combination is the first sign of low blood sugar and is caused by the release of the stress hormone epinephrine, also known as adrenaline.


When your blood sugar drops, it triggers the fight-or-flight response, causing a surge of adrenaline. This flood of adrenaline functions as a helper, moving stored glucose into the bloodstream quickly. However, this surge isnt without effects. Other symptoms like sweating, shakiness, and anxiousness can also be caused by this process.

That said, people with diabetes shouldnt assume their nausea is always related to low blood sugar. The only way to know for certain is to measure your blood sugar. If your levels are within the normal range, other factors may be contributing to your nausea.

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.
  • Dont 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. Dont 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 bodys 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 someones 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.


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Causes And Risk Factors Of Hypoglycemia

For most people with diabetes, hypoglycemia is more complex than simply not getting enough glucose. Your medication may cause low blood sugar, for example.

If you have type 1 diabetes or if you have type 2 diabetes and take insulin to regulate your blood sugar levels, you can experience low blood sugar if you do not take the proper amount of insulin, Dr. Dodell says. This is also noted by the American Diabetes Association.

Other diabetes medication can interfere with insulin production and make your glucose drop, too. Among these are the insulin-increasing drugs for type 2 diabetes called sulfonylureas and their less potent counterparts called meglitinides.


When Blood Sugar Is Too Low

Low Blood Sugar Symptoms

Hypoglycemia is the medical word for low blood sugar level. It needs to be treated right away. Why? Because glucose, or sugar, is the body’s main fuel source. That means your body including your brain needs glucose to work properly.

When blood sugar levels go lower than they’re supposed to, you can get very sick. Your parents and your diabetes health care team will tell you what your blood sugar levels should be and what to do if they get too low.

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Preventing A Low Blood Sugar Level

If you have diabetes, you can reduce your chance of getting a low blood sugar level if you:

  • Check your blood sugar level regularly and be aware of the symptoms of a low blood sugar level so you can treat it quickly.
  • Always carry a sugary snack or drink with you, such as glucose tablets, a carton of fruit juice or some sweets. If you have a glucagon injection kit, always keep it with you.
  • Do not skip meals.
  • Be careful when drinking alcohol. Do not drink large amounts, check your blood sugar level regularly, and eat a carbohydrate snack afterwards.
  • Be careful when exercising eating a carbohydrate snack before exercise can help to reduce the risk of a hypo. If you take some types of diabetes medicine, your doctor may recommend you take a lower dose before or after doing intense exercise.
  • Have a carbohydrate snack, such as toast, if your blood sugar level drops too low while you’re asleep

If you keep getting a low blood sugar level, talk to your diabetes care team about things you can do to help prevent it.


Nighttime Low Blood Sugar

While low blood sugar can happen at any time during the day, some people may experience low blood sugar while they sleep. Reasons this may happen include:

  • Having an active day.
  • Being physically active close to bedtime.
  • Taking too much insulin.
  • Drinking alcohol at night.

Eating regular meals and not skipping them can help you avoid nighttime low blood sugar. Eating when you drink alcohol can also help. If you think youre at risk for low blood sugar overnight, have a snack before bed.

You may wake up when you have low blood sugar, but you shouldnt rely on that. A continuous glucose monitor can alert you with an alarm if your blood sugar gets low while youre sleeping.

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What Is Normal Blood Sugar

When we eat, glucose — which is our body’s main source of energy — enters our bloodstream from our food. Then our pancreas secretes a hormone called insulin in just the right amount to help the glucose go from the bloodstream to our body’s various cells to be used as energy. This process usually keeps the glucose in our bloodstream in a healthy range, being neither too high, nor too low.


This range is measured in milligrams of blood glucose per deciliter, or mg/dL. Dr. Saleh Aldasouqi, Chief of Endocrinology at Michigan State University, explains to CNET: “Normal blood sugar is defined as anywhere from 70 to 110 mg/dL within a healthy physiology, as a person without diabetes or other related diagnosed condition. Sugar below 70 is generally considered low, and above 110 is considered high .”

Lack Of Physical Activity

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Physical activity is necessary to maintain a good level of blood sugar level. Living an active lifestyle helps diabetic patients to control their blood sugar level and prevent it from rising. Daily some amount of exercise or physical activity is necessary for diabetic patients.

But if they increase their physical activity suddenly then it causes a decrease in the blood sugar level. The intensity, duration, and timing of the exercise are the factors that cause low blood sugar levels. Only exercising and not eating enough food also causes hypoglycemia within 24hours of exercise.

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Treating Mild To Moderate Hypoglycemia

If you start feeling any of the symptoms listed above, check your blood sugar as soon as possible, then follow the chart below to treat low blood sugar. If you have any concerns, or cant test immediately, its best to treat first and check when possible.


If your blood sugar is

Eat this

What to do next

51 to 70 mg/dL

10 to 15 grams of fast-acting carbs, such as 4 ounces of fruit juice, 6 to 8 hard candies, or 3 to 4 glucose tablets.


Test your blood sugar again in 15 minutes. Repeat the treatment if necessary.

Under 50 mg/dL

Eat 20 to 30 grams of fast-acting carbs, such as 8 ounces of fruit juice, 12 to 16 hard candies, or 6 to 8 glucose tablets.

Test your blood sugar again in 15 minutes. Repeat the treatment if necessary.

How To Treat A Low Blood Sugar Level Yourself

Follow these steps if your blood sugar level is less than 3.5mmol/L or you have hypo symptoms:


  • Have a sugary drink or snack like a small glass of fizzy drink or fruit juice, 4 to 5 jelly babies, 3 to 6 glucose tablets or 1 to 2 tubes of glucose gel.
  • Test your blood sugar after 10 minutes if it’s improved and you feel better, move on to step 3. If there’s little or no change, treat again with a sugary drink or snack and take another reading after 10 to 15 minutes.
  • You may need to eat your main meal if it’s the right time to have it. Or, have a snack that contains a slow-release carbohydrate, such as a slice of bread or toast, a couple of biscuits, or a glass of cows’ milk.
  • You do not usually need to get medical help once you’re feeling better if you only have a few hypos.

    But tell your diabetes team if you keep having hypos or if you stop having symptoms when your blood sugar level is low.

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    Understanding Your Blood Sugar

    The best way to understand how your blood sugar changes day-to-day is to regularly use a blood glucose meter to check your blood sugar level. If youre newly diagnosed, its also helpful to keep a food journal in addition to a blood sugar log, as well as tracking any physical activity.

    Your blood sugar patterns are unique to you. Over time youll have a better understanding of which foods raise your blood sugars the most, as well as how your blood sugar responds to different types of exercise.

    Some people with diabetes choose to use a continuous glucose monitor to monitor their blood sugar trends.

    A continuous glucose monitor is a device with a sensor worn under the skin which measures blood sugar levels every 5-15 minutes. This is useful for identifying trends in blood sugar levels and can help predict and identify hypoglycemia sooner.

    Using a CGM can reduce the amount of finger prick glucose tests needed each day, which is an added benefit.

    Preventing Low Blood Sugar

    Is Your Diabetes Medication Causing Low Blood Sugar?

    If you have diabetes, these tips can help reduce your chances of getting low blood sugar:

    • check your blood sugar regularly and be aware of the symptoms of a low blood sugar so you can treat them quickly
    • always carry a sugary snack or drink with you, such as dextrose tablets, a carton of fruit juice or some sweets-if you have a glucagon injection kit, keep it with you at all times
    • don’t skip meals
    • be careful when drinking alcohol – don’t drink large amounts in a short space of time, and avoid drinking on an empty stomach
    • take care when exercising – eating a carbohydrate-containing snack before exercise can help reduce the risk of a hypo
    • have a carbohydrate-containing snack, such as biscuits or toast, before going to bed to stop your blood sugar level dipping too low while you sleep

    If you keep getting low blood sugar, talk to your diabetes care team about things you can do to help prevent it.

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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.

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