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When To Check Your Blood Sugar


How Do I Check My Blood Glucose

How to Test Your Blood Sugar
  • Wash your hands.
  • Put the lancet in the lancet device.
  • Put the test strip into the blood glucose meter.
  • Stick the finger on its side near the top of the finger .
  • Squeeze the finger so a drop of blood comes up on the skin.
  • Touch the blood sample to the test strip.
  • Read the blood glucose number on meter.
  • Picture 1: Poke the side of the finger with the lancet

    What Should My Blood Sugar Level Be

    When you’re first diagnosed with diabetes, your diabetes care team will usually tell you what your blood sugar level is and what you should aim to get it down to.

    You may be advised to use a testing device to monitor your blood sugar level regularly at home.

    Or you may have an appointment with a nurse or doctor every few months to see what your average blood sugar level is. This is known as your HbA1c level.


    Target blood sugar levels differ for everyone, but generally speaking:

    • if you monitor yourself at home with a self-testing kit a normal target is 4 to 7mmol/l before eating and under 8.5 to 9mmol/l 2 hours after a meal
    • if your HbA1c level is tested every few months a normal HbA1c target is below 48mmol/mol

    The Diabetes UK website has more about blood sugar levels and testing.

    How The Test Is Done

    You can buy a testing kit from a pharmacy without a prescription. Your provider can help you choose the right kit, set up the meter, and teach you how to use it.

    Most kits have:

    • Test strips
    • Small needles that fit into a spring-loaded plastic device
    • A logbook for recording your numbers that can be downloaded and viewed at home or at your provider’s office

    To do the test, prick your finger with the needle and place a drop of blood on a special strip. This strip measures how much glucose is in your blood. Some monitors use blood from areas of the body other than the fingers, reducing discomfort. The meter shows your blood sugar results as a number on a digital display. If your vision is poor, talking glucose meters are available so that you don’t have to read the numbers.


    Be aware that no meter or strip is accurate 100% of the time. If your blood sugar value is unexpectedly high or low, measure again with a new strip. Do not use strips if the container has been left open or if the strip has gotten wet.

    Also Check: How Can You Tell If Your Sugar Is High

    How To Use A Blood Sugar Meter

    There are different kinds of meters, but most of them work the same way. Ask your health care team to show you the benefits of each. In addition to you, have someone else learn how to use your meter in case youre sick and cant check your blood sugar yourself.

    Below are tips for how to use a blood sugar meter.

  • Make sure the meter is clean and ready to use.
  • After removing a test strip, immediately close the test strip container tightly. Test strips can be damaged if they are exposed to moisture.
  • Wash your hands with soap and warm water. Dry well. Massage your hand to get blood into your finger. Dont use alcohol because it dries the skin too much.
  • Use a lancet to prick your finger. Squeezing from the base of the finger, gently place a small amount of blood onto the test strip. Place the strip in the meter.
  • After a few seconds, the reading will appear. Track and record your results. Add notes about anything that might have made the reading out of your target range, such as food, activity, etc.
  • Properly dispose the lancet and strip in a trash container.
  • Do not share blood sugar monitoring equipment, such as lancets, with anyone, even other family members. For more safety information, please see Infection Prevention during Blood Glucose Monitoring and Insulin Administration.
  • Store test strips in the container provided. Do not expose them to moisture, extreme heat, or cold temperatures.
  • When Should You Check Your Blood Sugar After Eating

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    Are You Leading An Active Lifestyle

    Type 2 diabetes: when to check blood sugar for athletes and active people? Its said that activity helps control blood sugar levels and fight the disease. Your body becomes sensitive to insulin, and you may need more checkups when leading an active lifestyle. Its better to consult your doctor on this issue.

    Right Before Lunch Or Dinner

    Checking your blood sugar before your next meal can tell you two things:

    • How well your body and/or medication dosages handled your last meal
    • How well your body and/or medication dosages handled your blood sugar in the last few hours without food being digested.

    Keep in mind that some meals take longer to digest than others. High-fat meals that are also high in carbohydrates can take many hours to digest, affecting your blood sugar for many hours, too.

    A high blood sugar level before lunch or dinner could suggest:


    • What you ate or drank at your last meal was more than your body could handle on your current diabetes management regimen.
    • Your body may need some extra help from a diabetes medication.
    • Your current diabetes medications may need a change in dosage.
    • Your current diabetes medication may not be the right fit for you.
    • Its time to try a different type of diabetes medication.
    • Your overall insulin production or insulin resistance level has changed and your body needs more support from a new or current medication.

    A low blood sugar level before your next meal could suggest:

    • Youre getting too much of a certain diabetes medication .
    • Your insulin sensitivity or insulin production has improved, which means your medication dosages need to be adjusted by your healthcare team.

    Talk to your healthcare team about making any adjustments to your diabetes regimen to help you achieve your blood sugar goals.

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    Recommended Blood Sugar Targets For Most People With Diabetes*

    Your targets may not be the same as the examples in this chart. Your targets are important and should be specific to you.

    A1C**
    4.0 to 7.05.0 to 10.0

    * This information is based on the Diabetes Canada 2018 Clinical Practice Guidelines for the Prevention and Management of Diabetes in Canada and is a guide.** A1C is a measurement of your average blood sugar control for the last two to three months and approximately 50 per cent of the value comes from the last 30 days.


    What Are Normal Blood Glucose Levels In Healthy Individuals

    How to check your blood sugar

    Blood sugar levels can either be normal, high, or low, depending on how much glucose someone has in their bloodstream. Glucose is a simple sugar thats present in the bloodstream at all times. Normal blood glucose levels can be measured when someone fasts, eats, or after theyve eaten. A normal blood glucose level for adults, without diabetes, who havent eaten for at least eight hours is less than 100 mg/dL. A normal blood glucose level for adults, without diabetes, two hours after eating is 90 to 110 mg/dL.

    Many factors affect blood sugar levels throughout the day:

    • Type of food consumed, how much, and when
    • Physical activity
    • Menstrual periods
    • Alcohol

    An ideal blood sugar level for anyone without diabetes or prediabetes, regardless of age, in the morning should be less than 100 mg/dL. Remember, blood sugar levels can fluctuate throughout the day as a result of the factors previously mentioned.

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    Why Do I Have To Monitor My Blood Sugar

    Monitoring your blood sugar is the best way to find out how well your diabetes is being controlled, and gives you information on how to manage your diabetes on a daily basis. If your blood sugar is too low or too high, your healthcare provider might want to adjust your diet, exercise schedule, or the amount of medicine you are taking.


    Many things, such as food, physical activity, medication and stress, can affect your blood sugar. The following can raise it:

    • Eating too much
    • Not taking your diabetes medication
    • Illness, surgery, or stress

    These things can lower your blood sugar:

    • Missing meals, or just not eating very much
    • Taking too much diabetes medication
    • Drinking alcohol without eating
    • Too much activity

    Target Blood Sugar Levels For Pregnant Women With Diabetes

    It’s possible for diabetes to cause problems during pregnancy. For example, according to the Centers for Disease Control and Prevention, women with type 1 and type 2 diabetes who have uncontrolled blood sugar levels could experience an increased risk of having a premature baby, needing a C-section and more.

    Gestational diabetes a type of diabetes that occurs in a pregnant woman who has never been diagnosed with diabetes before can also cause complications. These include giving birth to a baby who is larger than average and an increased risk of needing a C-section. The ADA suggests that pregnant women shoot for a target fasting blood sugar level of 95 mg/dL or less before a meal.

    Read more:Do Oranges Raise Your Blood Sugar?


    Also Check: Type 2 Diabetes Survival Rate

    When To Get Urgent Medical Attention

    Contact your diabetes care team immediately if you have a high blood sugar level and experience the following symptoms:

    • feeling or being sick
    • a fever for more than 24 hours
    • signs of dehydration, such as a headache, dry skin and a weak, rapid heartbeat
    • difficulty staying awake

    These symptoms could be a sign of a more serious complication of hyperglycaemia, such as diabetic ketoacidosis or a hyperosmolar hyperglycaemic state, and you may need to be looked after in hospital.

    Blood Sugar Testing At Home

    How to test your blood sugar level?

    A person can test their blood sugar levels at home.

    In most cases, doctors ask people to measure fasting blood sugar immediately upon waking and before they have anything to eat or drink. It may also be appropriate to test blood sugar before eating or 2 hours after a meal, which is when blood sugar returns to normal levels.


    The right time to test depends on treatment goals and other factors. For example, most people with diabetes do not need to test between meals unless they are using a diabetes drug that can lower blood sugar. Other people may test between meals if they feel their sugar levels may be low.

    Since people with type 1 diabetes do not make any insulin, they need to test their blood sugar levels several times a day so they can adjust their insulin doses.

    A person will test blood sugar levels by:

    • preparing the testing strip and glucose monitor to be ready for the blood sample
    • using an alcohol swab to clean the testing area, which is usually the side of a fingertip
    • lancing the testing area and bracing against a firm surface to help resist the impulse to pull away
    • squeezing the testing area around the wound to maximize blood flow
    • squeezing a drop of blood onto the test strip
    • putting the strip into the monitor
    • recording the time, blood sugar reading, and recent food intake in a log

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    What To Know About Blood Sugar Levels And Driving

    If you have type 1 diabetes or have type 2 diabetes and take insulin, its possible to develop low blood sugar while driving, causing difficulty concentrating, making decisions, and operating the vehicle. You may even pass out. Before you head out on the road, check your blood sugar levels, especially if youre taking insulin or insulin-releasing med, such as Glucotrol , says Dr. Thomas. Depending on the length of your journey, you should also pull over during your trip to check your levels again. The bottom line: Swings in glucose levels with diabetes can be controlled if you monitor them carefully.


    Stress, Meals, Exercise and Blood Sugar Testing:Journal of Diabetes Research. Variables to Be Monitored via Biomedical Sensors for Complete Type 1 Diabetes Mellitus Management: An Extension of the On-Board Concept.

    Regular Blood Sugar Testing:Diabetes Care. Management of Hyperglycemia in Type 2 Diabetes, 2018. A Consensus Report by the American Diabetes Association and the European Association for the Study of Diabetes .

    Hypoglycemia:BMJ Open Diabetes Research and Care. Never Again Will I Be Carefree: A Qualitative Study of the Impact of Hypoglycemia on Quality of Life Among Adults with Type 1 Diabetes.

    Normal Blood Sugar Levels In Children

    Younger than 6 years old mg/dL

    Bedtime100-140

    Adults who are 20 years or older will have blood sugar levels that range between less than 100-180 mg/dL over the course of a day. When you wake up in the morning, your fasting blood sugar should be at its lowest because you havent consumed food for about eight hours. If youre an adult and struggling with glucose control, your healthcare provider can help you develop a treatment plan to manage your blood sugar better.


    Blood glucose levels outside the ranges listed above are categorized as either high or low blood sugar. Blood sugar levels are considered high if theyre over 130 mg/dL before a meal or 180 mg/dL within one to two hours after a meal. Many people wont start to experience symptoms from high blood sugar until their levels are at 250 mg/dL or higher. The highest blood sugar level thats considered safe will depend on the person and whether they have diabetes, but will typically be between 160 to 240 mg/dL.

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    Can I Check My Own Blood Sugar

    You can do blood sugar level check by doing a finger-prick test, by using a blood sugar monitor called a flash glucose monitor or with a continuous glucose monitor . You can do this several times a day helping you keep an eye on your levels as you go about your life and help you work out what to eat and how much medication to take. Find out your ideal target range.

    Not everyone with diabetes needs to check their levels like this. Youll need to if you take certain diabetes medication. Always talk to your healthcare team if youre not sure whether thats you theyll give you advice on whether to check them yourself and how often.

    And theres also something called an HbA1c, which is a blood test to measure your average blood sugar level over the last three months. Everyone with diabetes is entitled to this check.


    High blood sugar levels increase your risk of developing serious complications. However you manage your diabetes, stay in the know about your blood sugar levels

    How Do I Record My Blood Sugar Test Results

    How to check your blood sugar

    Keep good records of any blood, urine, or ketone tests you do. Most glucose monitors also have a memory. Your records can alert you to any problems or trends. These test records help your doctor make any needed changes in your meal plan, medicine, or exercise program. Bring these records with you every time you see your doctor.

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    Diabetes And Checking Blood Sugar

    How often do you check your blood sugar with type 2 diabetes? There are 3 common reasons for monitoring your blood sugar levels:

    • youre interested in the result but have no prescription for blood sugar monitoring.
    • you take insulin daily.
    • you arent prescribed the insulin injections.

    The last 2 points should be answered in more detail. Lets clear the issue and determine how often to check blood sugar type 2 diabetes in such cases.


    Best Times Of Day To Check Your Blood Sugar

    Your blood sugar can change constantly throughout the day. Checking your blood sugar with test-strips or an FBGM several times throughout the day is just as important as taking your medications.

    For example, checking your blood sugar before breakfast tells you how well your body is managing during the 8 hours you were asleep, but it doesnt tell you how well your body handles meals.

    Here, well look at the best times to check your blood sugar for the most information about your diabetes management!

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    Exercise And Blood Sugar Testing

    When we exercise, our muscles use glucose as a source of energy and this increased energy use persists after exercise, says Celeste Thomas, M.D., assistant professor of medicine in the department of endocrinology, diabetes, and metabolism at the University of Chicago. This puts some people with diabetes at risk for low blood sugar during and after exercise. For anyone taking insulin, checking your blood sugar both before and after exercising can help you keep tabs on any sudden drop. Adjusting your blood sugar-lowering medication prior to exercise and eating carbohydrates prior to or during a workout can help stabilize those readings, says Wolf.

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