Low Blood Sugar

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How to Prevent Low Blood Sugar

Two Methods:

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 to diabetes or as a reaction to a specific food eaten (or when you don't eat enough). 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 and fainting and, in more severe cases, seizures, coma and even death.


Preventing Low Blood Sugar

  1. Follow your doctor's instructions.Be sure to consistently follow your doctor’s instructions about medications, including insulin and other oral diabetes medications, on how to take them and when. Further, if your doctor has put you on a strict diet or you've consulted with a nutritionist or registered dietician, make a concerted effort to follow those dietary plans, which were designed precisely to avoid complications with your illness and to keep your blood sugar levels stabilized throughout the day.
    • Sometimes the best preventive medicine is to follow the rules and guidelines set by your primary healthcare practitioner.
  2. Test your blood sugar regularly.Individuals with diabetes are recommended to monitor their blood sugar at least once daily, ideally upon waking in the morning and before eating anything. Be sure to log the number on a data sheet or journal, noting the date, time and result of the test. Some diabetics, especially those with “brittle” diabetes, a condition marked by swings in blood sugar levels, should check their blood sugar more frequently and up to four times a day (before breakfast, lunch and dinner and before going to sleep). To monitor your blood sugar level using a glucometer (a blood sugar meter), purchase the meter, lancets to prick the finger, compatible test strips and alcohol pads to cleanse finger before pricking it. To test your blood sugar:
    • Wash your hands with soap and water.
    • Take the alcohol pad and cleanse the pad of the index or middle finger.
    • Hold the lancet against your finger at 90 degrees and release the lever to prick your finger.
    • Squeeze a drop of blood onto test strip.
    • Insert the test strip into the glucometer slot and await the reading.
    • Log the measurement in your data log. A level of 70 mg/dL or lower is indicative of low blood sugar and this is usually when you will begin to experience the symptoms of hypoglycemia.
  3. Eat three meals and three snacks throughout the day.You should eat three full meals and have three small snacks throughout the day so that you are eating regularly and consistently. Make sure to time the meals and snacks so that the gaps between them are evenly spaced out; if you miss a snack or eat later than usual, this can cause your blood sugar to get lower.
    • Plan your meals so that they are never more than four or five hours apart.
    • Never skip meals if you have diabetes. This is especially important if you are taking medications for diabetes.
    • Make sure you account for any extra calorie expenditure. For example, if you're running a marathon on a Saturday, you will need to make sure to eat more that day than you would on a normal day.
  4. Make your meals are well balanced.The meals should contain a protein source, such as chicken, fish or beef, that is approximately the size of a deck of cards (3-4 ounces). If you're vegetarian, make sure to get a different source of protein, such as eggs, tofu, soybeans, or Greek yogurt. Along with your protein source, make sure each meal contains a source of complex carbohydrates and plenty of fresh fruit and vegetables.
    • Complex carbohydrates should comprise 40 to 60% of your daily diet and good sources include brown rice, beans, and whole grain breads as well as vegetables such as kale, cabbage and broccoli. Limit refined carbohydrates like white bread, pastries, syrups and candy.
    • Good choices for fruit include oranges, peaches, grapes, blueberries, strawberries, and watermelon, among others; these will not only round out your meal but also provide valuable phytonutrients. Fresh fruit is a great source of natural sugar, which can spike your blood sugar and prevent hypoglycemia.
    • A good rule of thumb is that your plate should be two-thirds full of vegetables and fruits.
  5. Limit caffeine.Avoid beverages and foods that contain significant levels of caffeine, including coffee, tea and some types of sodas. Caffeine can cause the same symptoms as hypoglycemia, which may make you feel even worse.
  6. Keep snacks with you at all times.If you are at risk for hypoglycemia, keep quick-fix foods at work, in the car, or anywhere else that you spend time. Good healthy and convenient on-the-go options include as string cheese, nuts, yogurt, fruit or a smoothie.
  7. Consume alcohol with food.Consuming alcoholic beverages, particularly on an empty stomach, can cause hypoglycemia in some people. In some cases, this reaction may be delayed for a day or two so the correlation may be difficult to identify. If you consume alcohol, always drink alcoholic beverages with a meal or a snack.
  8. Exercise at the right time.Exercise is very beneficial for diabetics, especially because it helps to lower blood glucose levels. By the same token, physical activity can also bring down those levels too far - even up to 24 hours after the exercise. If you engage in exercise, make sure that you are exercising a half hour to one hour after you've just had a meal. Always check your blood sugar before and after exercise.
    • Carry a snack with you if doing strenuous exercise, like running or cycling. A snack can help prevent the onset of hypoglycemia.
    • If you're burning lots of calories, you may need to adjust your medication or eat additional snacks. The adjustment is dependent on the results of your blood sugar test results and how long and how intense the exercise you are doing is. You should consult your physician if you're diabetic and want to maintain your exercise regimen while also managing your condition.
  9. Treat an episode of low blood sugar.At the first sign of hypoglycemia symptoms, promptly ingest a quick snack. Go for whatever you have on hand or is available the quickest. Symptoms should dissipate within 10 to 15 minutes after consumption; re-test your blood sugar after 15 minutes to make sure it's back up to 70 mg/dL or higher. If it's still too low, eat another snack. There is no need to go to the hospital or visit your doctor if you an experience a one-off episode. If you can, stay seated, as you may become faint. Good quick-fix food options include:
    • 1/2 cup (4 oz) of fruit juice (orange, apple, grape, etc.)
    • 1/2 cup (4 oz) of regular soda (not diet)
    • 1 cup (8 oz) of milk
    • 5 or 6 pieces of hard candy (Jolly ranchers, Lifesavers, etc.)
    • 1 tbsp of honey or sugar
    • 3 or 4 glucose tablets or 1 serving (15 g) of glucose gel. Keep in mind that the appropriate doses of these items may be less for small children; read the instructions before giving glucose medication to children in order to determine appropriate dosage.

Understanding Low Blood Sugar

  1. Understand how hypoglycemia works.Hypoglycemia, or low blood sugar, occurs when your blood sugar drops below the normal level. An individual will typically begin to feel the symptoms of hypoglycemia when their blood glucose drops below 70 mg/dL. Low blood sugar occurs almost exclusively in diabetics in response to insulin therapy along with insufficient caloric intake, excessive dosages of insulin, or the exertion of energy without sufficient caloric intake (such as if you were to run a 10k but didn't account for that by having snacks).
    • Other rare causes include a tumor in the pancreas that produces excess insulin (insulinoma) and reactive hypoglycemia, which occurs when blood sugar drops after eating a meal or specific food.
    • Hypoglycemia can be a side effect of some medications used to treat diabetes, including insulin and pills (such as glipizide and glyburide) that are taken to increase insulin production. Certain combinations of medications (like glipizide and metformin or glyburide and metformin) can also cause hypoglycemia.This is why it is vital that you disclose all medications, vitamins, and supplements (including herbal remedies) you're taking to your doctor.
  2. Know the symptoms of low blood sugar.There are a number of physical and mental symptoms that you can identify as signs that your blood sugar is low, including:
    • Shakiness
    • Dizziness
    • Weakness
    • Mental confusion (e.g., uncertain of the date, year, etc.)
    • Altered level of consciousness, poor concentration, or drowsiness
    • Diaphoresis or a “cold sweat”
    • Coma (Note: Severe disorientation and coma do not occur until your blood glucose level reaches around 45mg/dL)
  3. Be preventive and take precautions.Test your blood sugar at least once daily (when you wake up and before eating anything). Follow the above recommendations to exercise regularly and eat meals and snacks throughout the day. Take care to bring snacks with you while you're out as a precaution.
    • In addition, If you have diabetes, or are prone to bouts of hypoglycemia, describe your symptoms to your friends, family, and a trusted co-worker so that they can help you if you experience a rapid or severe drop in blood sugar. In the case of young children, school staff should be instructed on how to recognize and treat a child's hypoglycemia symptoms.
    • Consider carrying a form of diabetes identification, like a medical identification necklace or bracelet or a card in your wallet, so that people can know that you have diabetes in an emergency situation.
    • Be careful when driving because hypoglycemia symptoms can make driving extremely dangerous. When driving long distances, check your blood sugar levels frequently (especially before getting behind the wheel) and snack as needed to maintain a blood glucose level of at least 70 mg/dL.
  4. Consult your physician.Notify your healthcare provider if you are having persistent episodes of hypoglycemia (more than a few times a week) so that they can adjust your medication dosages accordingly.
    • It is important to bring your blood glucose log, so your doctor can figure out when your insulin is peaking and glucose level is falling, so that he can time the use of the correct type of insulin (regular, intermediate or long-acting). Dosing at the correct times of the day, as determined by your log, can help ensure that you do not have any subsequent episodes of hypoglycemia.

Community Q&A

  • Question
    I just found out I have low blood sugar; is there something I am doing wrong?
    wikiHow Contributor
    Community Answer
    Talk to your doctor to see if lifestyle habits are influencing your hypoglycemia.
  • Question
    What can I do if I have been experiencing low blood sugar for two days?
    wikiHow Contributor
    Community Answer
    Monitor it every two hours, and write down what you are eating. Follow the "what to eat" suggestions in the article. If that does not help, see your doctor.
  • Question
    My level is at around 65 in the evenings and I feel like a different person. What should I do about this?
    wikiHow Contributor
    Community Answer
    Eat a dinner meal, and drink a glass of pure fruit juice before bed. If that doesnt raise it, see a doctor.
Unanswered Questions
  • So far I am not diabetic but have low blood sugar every so often I am 72?
  • How do I treat my low blood sugar?
  • How do I remedy my low blood sugar levels?
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  • Learning how to optimize your blood sugar and avoid episodic hypoglycemia takes time and requires motivation and compliance in order to ensure your overall health and well-being.


  • Hypoglycemia can come on quite quickly and is usually easily treatable by eating something sugary. However, if it is not treated, it can worsen and lead to confusion, clumsiness, or fainting. Severe cases of hypoglycemia can result in seizures, coma, and even death.

Related wikiHows

Sources and Citations

  1. Philip Cryer,The Barrier of Hypoglycemia, Diabetes, 2008 Dec 57 12 3169-3176
  2. Kevin Stuart, Annmarie, Field, Jessie Raju, :Postprandial Reactive Hypoglycemia, varying presentation patterns in extended glucose tolerance tests and possible therapeutic approaches, Hindawi, Case Reports in Medicine, 2013 article ID 273957

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Date: 09.12.2018, 13:38 / Views: 95163