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How Can You Tell If Your Blood Sugar Is Low


What Are The Signs & Symptoms Of Low Blood Sugar

HOW DO YOU FEEL IF YOUR BLOOD SUGAR IS HIGH OR LOW?

Different people may feel low blood sugar levels differently. People with low blood sugar may:

  • feel hungry or have hunger pains in their stomach
  • feel shaky or like theyre trembling
  • have a rapid heart rate
  • feel sweaty or have cold, clammy skin
  • have pale, gray skin color
  • have a headache
  • have seizures or convulsions
  • lose consciousness

If you have diabetes, try to remember how your body reacts when your blood sugar levels are low. It may help you figure out when youre having a low blood sugar level more quickly the next time.

Symptoms Of High And Low Blood Sugar

Managing your blood sugar levels is essential for your energy, brain function, mood and basic functions of your body. Our nutritionists explain the symptoms of high and low blood sugar, what normal levels of blood sugar should be, and how to lower or increase your blood sugar healthily through your diet.

How Do I Pay For These Tests And Supplies

Medicare, Medicaid and most private insurance plans pay for the A1C test and some of the cost of supplies for checking your blood sugar. Check your plan or ask your health care team for help finding low cost or free supplies. Ask your health care team what to do if you run out of test strips. For more information about Medicare and diabetes, go to .


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Take Medications As Prescribed

Certain diabetes medications can cause low blood sugar. The most common diabetes medications with a risk of hypoglycemia are insulin and sulfonylureas. Avoid changing your medication doses on your own, which might cause low blood sugar.

If you have type 1 diabetes or type 2 diabetes and you take insulin, your risk of low blood sugar is greater than people taking only oral medications.

Insulin is the most effective medication at lowering blood sugar, which is why it comes with a risk of hypoglycemia.

What To Do If Your Blood Sugar Is Low

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Medically reviewed by Drugs.com. Last updated on Mar 2, 2022.


Low blood sugar levels can happen with Type 1 and Type 2 diabetes. Low levels are more likely to happen if you use insulin. Hypoglycemia can cause you to have falls, accidents, and injuries. A blood sugar level that gets too low can lead to seizures, coma, and death. Learn to recognize the symptoms early so you can get treatment quickly.

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What Drinks And Foods Raise Blood Sugar Fast

  • 4 teaspoons of sugar
  • 1/2 can of regular soda or juice

Many people like the idea of treating low blood sugar with dietary treats such as cake, cookies, and brownies. However, sugar in the form of complex carbohydrates or sugar combined with fat and protein are much too slowly absorbed to be useful in acute treatment.

Once the acute episode has been treated, a healthy, long-acting carbohydrate to maintain blood sugars in the appropriate range should be consumed. Half a sandwich is a reasonable option.


If the hypoglycemic episode has progressed to the point at which the patient cannot or will not take anything by mouth, more drastic measures will be needed. In many cases, a family member or roommate can be trained in the use of glucagon. Glucagon is a hormone that causes a rapid release of glucose stores from the liver. It is an injection given intramuscularly to an individual who cannot take glucose by mouth. A response is usually seen in minutes and lasts for about 90 minutes. Again, a long-acting source of glucose should thereafter be consumed to maintain blood sugar levels in the safe range. If glucagon is not available and the patient is not able to take anything by mouth, emergency services should be called immediately. An intravenous route of glucose administration should be established as soon as possible.

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What Should I Do If My Blood Sugar Gets Too High

High blood sugar is also called hyperglycemia . It means that your blood sugar level is higher than your target level or over 180. Having high blood sugar levels over time can lead to long-term, serious health problems.

If you feel very tired, thirsty, have blurry vision, or need to pee more often, your blood sugar may be high.

Check your blood sugar and see if it is above your target level or over 180. If it is too high, one way to lower it is to drink a large glass of water and exercise by taking a brisk walk. Call your health care team if your blood sugar is high more than 3 times in 2 weeks and you dont know why.


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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

About High Blood Sugar

What Is a Low Blood Sugar and What Can You Do About It

High glucose levels occur when the body doesn’t have enough insulin or can’t properly use the insulin it has to shuttle glucose from the bloodstream to the bodys muscles, organs, and tissues for fuel, ONeill says. As a result, the amount of sugar in the blood builds up.


Hyperglycemia typically happens when you consume more carbohydrates or bigger portions of food than usual if you don’t take enough insulin or other diabetes medication as prescribed and if you decrease your levels of physical activity, she says. Heightened stress levels can also increase blood sugar levels. Non-diabetes-related medications that are known to raise blood sugar levels include steroids, beta-blockers, birth control pills, and many mental health medications, she explains.

Signs of high blood sugar include frequent urination, fatigue, dry or itchy skin, feeling thirsty, more frequent infections, and eating more food but not gaining as much weight as usual, says Athena Philis-Tsimikas, MD, the corporate vice president for the Scripps Whittier Diabetes Institute in La Jolla, California.

High blood sugar levels can cause these symptoms through various mechanisms, according to the Mayo Clinic. For example, high blood sugar levels damage blood vessels and nerves throughout the body. They can also deprive organs of energy and can cause fluid to accumulate in the eyes. And in an attempt to get your blood sugar to a healthier level, your body will often increase urine output.

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What Can I Do To Prevent Hypoglycemia In My Child

Not all episodes of hypoglycemia can be prevented. Most children with type 1 diabetes will have hypoglycemia. The chances of severe hypoglycemia go down as your child gets older. But you can help prevent severe episodes by:


  • Testing your childs blood glucose often, including at night

  • Checking that the glucose test strips are not outdated and match the glucose meter

  • Recognizing symptoms

Other ways to minimize or prevent hypoglycemia include making sure your child:

  • Takes medicines at the right time

  • Eats enough food

  • Doesnt skipping meals

  • Checks blood glucose before exercising

  • Eats a healthy snack if needed. The snack should include complex carbohydrates and some fat, if possible.

Protein With Complex Carbohydrates

Complex carbohydrates include whole grains, whole-wheat bread, potatoes, quinoa, beans, oatmeal and many vegetables. They all provide healthy, slow releasing sugars. When you eat protein with complex carbohydrates, the protein slows down the release of the healthy sugars and helps limit the spike of blood sugar in your body.

Discover the ‘5 best carbs for plant-based diets‘.

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Low Blood Sugar Levels In Diabetes

People with diabetes can have low blood sugar levels because of the medicines they have to take to manage their diabetes. They may need a hormone called 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 bodys cells, which makes the blood sugar level go down. But sometimes its a tricky balancing act and blood sugar levels can get too low.

People with diabetes need to keep their blood sugars from getting too highor too low. Keeping blood sugar levels in a healthy range means balancing when and what they eat, and when they exercise with when they take medicines.

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What Is A Normal Blood Sugar Level

The Effects of Low Blood Sugar on Your Body

Normal blood glucose levels are from between 4.0 to 5.4 mmol per litre of blood when fasting, and up to 7.8 mmol per litre of blood two hours after a meal.

If you’re having your blood sugar levels tested, your doctor will perform something called a ‘glucose tolerance test‘ which involves two blood tests, one after fasting, and one after the consumption of a sugary drink.


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How Can Parents Help

Nearly every child with diabetes will have an episode of hypoglycemia at times. You can help make this less likely, and be ready if it does happen. Here are some tips:

  • Follow your childs diabetes care plan. This is the best way to keep their sugars in a healthy range. The plan will guide you on the timing of:
  • meals
  • exercise
  • blood sugar checks
  • Have your child avoid baths or hot showers right before and after an insulin shot. Ask your care team how long your child should wait.
  • Track and adjust sugar levels before and during exercise. And make sure your child eats snacks as needed to keep or bring blood sugar levels into the healthy range.
  • Keep sugar handy and give it to your child right away if they have symptoms.
  • Teach adult family members, caregivers, and school staff the signs of hypoglycemia, when and how to give glucagon, and when to get emergency medical care.
  • Get your child a medical ID. Your child should wear or carry identification stating they have diabetes and includes who to contact in case of an emergency.
  • If you have questions about how to prevent or treat hypoglycemia, or about the diabetes care plan, call your child’s diabetes health care team.

    Signs Of Low Blood Sugar

    With hypoglycemia, the blood sugar falls below the normal, healthy levels mentioned earlier, which can occur for a variety of reasons.

    “Although some people with blood sugar problems may not experience symptoms,” Dr. Aldasouqi continued, “there are some key things to look out for. For those with low blood sugar, someone might have symptoms like anxiety, sweating, increased heart rate, confusion, and may go into what is called ‘a hypoglycemic coma’… The term ‘diabetic coma’ is also used by some.”


    Other symptoms of low blood sugar may include:

    • Fatigue
    • Tingling or numb lips, tongue or cheek
    • Blurry vision

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    How To Prevent Nocturnal Hypoglycemia

    Start by talking to your doctor about a bedtime blood sugar target. Ask about your risk for hypoglycemia and if you should get a glucagon kit. Dont miss dinner, exercise before bedtime, or drink alcohol at night. Have a sugar and protein snack before bedtime, like a wheat cracker with cheese.

    If you have had symptoms of nocturnal hypoglycemia, work with your doctor on a prevention plan. This may include switching to a longer acting insulin that does not peak during sleep, or changing your insulin dose. You might be asked to set an alarm and check your blood sugar in the early morning for a while. For people at high risk for nocturnal hypoglycemia, a continuous glucose monitor may be the best solution. A CGM can check your blood sugar every 5 minutes and can set off an alarm if your sugar gets too high or too low.

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    Low blood sugar is called hypoglycemia and occurs when blood sugar levels fall below 70 mg/dL. Low blood sugar can become life-threatening if it becomes severe, so its essential that people with diabetes and those caring for them know which foods to eat when low blood sugar occurs.

    Suppose someone has repeated incidents of low blood sugar. In that case, they may develop hypoglycemia unawareness, which is when they dont notice low blood sugar symptoms as quickly as they once could. Hypoglycemia unawareness increases the risk of severe hypoglycemia, so treating and preventing hypoglycemia is very important for the health and safety of people with diabetes.

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    What Is The Outlook For People With Hypoglycemia

    Hypoglycemia can be managed when you and your healthcare provider understand what causes your blood sugar to go down. Give your healthcare provider as much information as possible about any hypoglycemic episodes. Fixing the problem may be as simple as changing the times you take medication, eat and exercise. Minor changes to the types of food you eat may also help.


    What If All The Tests Results Are Normal Except For Low Blood Sugar

    If the serum biochemistry profile confirms a pet has low blood glucose, and no other abnormalities can be found, then the hypoglycemia may be due to an underlying tumor called an insulinoma. This is a tumor of the insulin-producing cells of the pancreas and causes excessive amounts of insulin to be released into the blood stream. Insulin is the hormone responsible for removing glucose from the blood.

    In a pet with an insulinoma, the excess insulin causes too much glucose to be removed from the blood and blood glucose levels fall dangerously low. Affected animals show clear signs of hypoglycemia, including seizures.

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    What Causes A Low Blood Sugar Level

    In people with diabetes, the main causes of a low blood sugar level are:

    • the effects of medicine especially taking too much insulin, medicines called sulfonylureas , medicines called glinides , or some antiviral medicines to treat hepatitis C
    • skipping or delaying a meal
    • not eating enough carbohydrate foods in your last meal, such as bread, cereals, pasta, potatoes and fruit
    • exercise, especially if it’s intense or unplanned
    • drinking alcohol

    Sometimes there’s no obvious reason why a low blood sugar level happens.


    Very occasionally, it can happen in people who do not have diabetes.

    What Causes Reactive Hypoglycemia

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    Reactive hypoglycemia comes from having too much insulin in your blood. It usually happens within a few hours after you eat. Other possible causes include:

    • Having prediabetes or being more likely to have diabetes

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    What Causes Low Blood Glucose

    • Symptoms occur when blood glucose levels fall below 70 mg/dl a condition known as hypoglycemia.
    • In most cases, low blood glucose results from overtreatment: Either taking too much diabetes medication or not eating enough food. Higher doses of medicine than the person actually requires can also lead to hypoglycemia.
    • People who aim for too-low values on their A1C test tend to experience more frequent drops in blood glucose.
    • Vigorous exercise doesn’t just burn calories, it also burns blood glucose! Hypoglycemia can occur unless blood glucose levels are carefully monitored during and after exercise.
    • Not eating on a regular basis can deprive the body of glucose and make it difficult to prevent hypoglycemia. Eat balanced meals throughout the day and always keep a snack on hand.

    Hypoglycemia Tests And Diagnosis

    To diagnose nondiabetic hypoglycemia, your doctor will do a physical exam and ask questions about any medicines you take. Theyâll want to know all about your health and any history of diseases or stomach surgery.

    Theyâll check your blood glucose level, especially when you are having symptoms. Theyâll also check to see if you feel better when your sugar goes back to a normal level.

    If your doctor suspects hypoglycemia, you may have to fast until you start to have symptoms. Theyâll test your blood glucose level at different times throughout the fast.

    To check for reactive hypoglycemia, you may have to take a test called a mixed-meal tolerance test . For this, you take a special drink that raises your blood glucose. The doctor will check your blood glucose levels over the next few hours.

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    What Else Can You Do To Control Blood Sugar Levels

    Yes. People with diabetes should wear identification stating they have diabetes and whether they have recurrent low blood sugar. Those at risk for the health condition should be counseled on checking blood sugars before they drive a car, operate heavy machinery, or do anything physically taxing. In addition, it is important to carry a quick-acting glucose source at all times, and keep a source in their car, office, and by their bedside. Efforts should be made to minimize the hypoglycemic effects of drug regimens and to avoid variable surges in exercise, activity, and drinking alcohol.

    How Do I Treat Low Blood Glucose

    LOW blood SUGAR in Diabetics (hypoglycemia). Everything you NEED to know!

    If you begin to feel one or more symptoms of low blood glucose, check your blood glucose level. If your blood glucose level is below your target or less than 70 mg/dL, follow these steps

  • Eat or drink 15 to 20 grams of glucose or carbohydrates right away. Examples include
  • four glucose tablets or one tube of glucose gel.
  • 1/2 cup of fruit juicenot low-calorie or reduced-sugar juice. If you have kidney disease, dont drink orange juice because it has a lot of potassium. Apple, grape, or cranberry juice are good options.
  • 1/2 can of sodanot low-calorie or reduced-sugar soda.
  • 1 tablespoon of sugar, honey, or corn syrup.
  • Wait 15 minutes and check your blood glucose level again. If your glucose level is still low, eat or drink another 15 to 20 grams of glucose or carbohydrates.
  • Check your blood glucose level again after another 15 minutes. Repeat these steps until your glucose level is back to your target range.
  • If your next meal is more than 1 hour away, have a snack to keep your blood glucose level within a range that is healthy for you. Try crackers or a piece of fruit.
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