Why Does Blood Sugar Go Up At Night
There are many factors that can cause your blood sugar to increase at night. For example: what food you ate during the day, how much and when you exercised, whether you ate snacks before bed, the timing of your insulin doses, and your stress level. You can experience different patterns of high blood sugar at night. You may start with high glucose when you go to bed, start the night in range but go high several hours later, or spend most of the night in range until the hours just before you wake up. By identifying your bodys patterns, you can figure out what is causing your high blood sugar and how to address it.
Common causes of a glucose increase at night include:
Planning For Sick Days
Your body releases stress hormones when you are sick, which can cause hyperglycemia. Keep taking your insulin and other diabetes medications, even if you are throwing up. If you have ketones and your blood sugar is above 240 mg/dL, call your doctor. They might also want you to call if:
- You have diarrhea that lasts more than 6 hours
- You are throwing up
- You have a high fever or trouble breathing
- You feel very sleepy or confused
Continue checking your blood sugar levels and keep track of the results.
How Common Is Low Blood Glucose
Low blood glucose is common among people with type 1 diabetes and among people with type 2 diabetes who take insulin or some other diabetes medicines. In a large global study of people with diabetes who take insulin, 4 in 5 people with type 1 diabetes and nearly half of those with type 2 diabetes reported a low blood sugar event at least once over a 4-week period.2
Severely low blood glucose, defined as when your blood glucose level drops so low you cant treat it yourself, is less common. Among U.S. adults with diabetes who take insulin or some diabetes medicines that help the pancreas release insulin into the blood, 2 in 100 may develop severely low blood glucose each year.3
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What To Know About Diabetic Macular Edema
Fiber plays a preventative role, too. Studies have found that high-fiber diets can reduce the incidence of type 2 diabetes by 15 to 19 percent compared to low-fiber diets, according to a March 2018 study published in the Journal of Chiropractic Medicine.
Youll find fiber in plant foods such as raspberries, peas, and whole grains, according to the Mayo Clinic. Beans are another good source of fiber. People with type 2 diabetes who ate at least a cup of legumes daily for three months had lower blood glucose levels as measured by the A1C test, according to a study published in the Archives of Internal Medicine. Beans also are an excellent source of folate, which is linked to a lower risk of cardiovascular disease, a common diabetes complication, according to the National Institutes of Health.
Men should aim for 30 to 38 g of fiber per day, and women should eat 21 to 25 g per day, according to the Mayo Clinic.
How Does Hyperglycemia Happen
Insulin is a hormone that lets your body use the sugar in your blood, which comes primarily from carbohydrates in the food that you eat. Hyperglycemia happens when your body has too little insulin to use the sugar in your blood.
People with type 1 diabetes can have episodes of hyperglycemia every day. Although this can be frustrating, it rarely creates a medical emergency. Not taking enough insulin can lead to hyperglycemia .
Other things that can cause hyperglycemia include:
- Caffeine
- Having trouble seeing or concentrating
- Experiencing stomach pain, nausea, or vomiting
- Having sweet-smelling or fruity breath
- Cuts or sores that do not heal, infections, and unexplained weight loss may also be signs of long-term hyperglycemia.
If you notice any of these symptoms, you should check your blood sugar. If your blood sugar is very high, you should also test for ketones in either your blood or urine.
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Symptoms And Signs Of High Blood Sugar
Other symptoms and signs of high blood sugar include:
Nose spray. Some nasal sprays have chemicals that trigger the liver to make more blood sugar.
Severely elevated blood sugar levels can result in a medical emergency . This can occur in both people with type 1 and those with type 2 diabetes. People with type 1 diabetes may develop diabetic ketoacidosis , and those with type 2 diabetes can develop hyperglycemic hyperosmolar nonketotic syndrome . These so-called hyperglycemia crises are serious conditions that can be life threatening if not treated immediately. Hyperglycemic crises cause about 2,400 deaths each year in the U.S.
Over time, hyperglycemia can lead to damage to organs and tissues. Long-term hyperglycemia can impair the immune response, leading to poor healing of cuts and wounds. It can also cause nerve damage, vision problems, and damage to the blood vessels and kidneys .
How Do You Treat Hypoglycemia
Low blood sugar levels happen when theres too little glucose left in the bloodstream to continue supplying fuel to your organs, muscles, and tissues. It most often occurs when you dont eat enough food, especially carb-containing foods, given your blood-sugar-lowering medications and physical activity levels, ONeill says. Levels can decrease gradually or suddenly.
When the amount of glucose in the bloodstream drops to too-low levels, the body reacts by releasing epinephrine, also called adrenaline or the fight or flight hormone. Epinephrine revs your heart rate and can cause sweating, shaking, anxiety, and irritability. If not enough glucose is able to reach the brain, the result may be difficulty concentrating, confused thinking, and slurred speech. In extreme cases, a lack of glucose within the brain can lead to seizures, coma, and even death, she says.
People with low glucose levels can use the ADAs 15-15 Rule, which advises people consume 15 g of carbs, wait 15 minutes, and check their levels again. If the number is still low, repeat until reaching at least 70 mg/dL.
You can find 15 g of carbs in:
- 1 slice of bread
- 1 small piece of fresh fruit
- cup of yogurt
- Three to four hard candies
- Glucose tablets as indicated on the label
- Glucose gel as indicated on the label
Once your glucose levels are back to normal, the ADA suggests going ahead and eating your next scheduled meal or snack, which will help prevent levels from dropping again.
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When Should I Check My Blood Sugar
How often you check your blood sugar depends on the type of diabetes you have and if you take any diabetes medicines.
Typical times to check your blood sugar include:
- When you first wake up, before you eat or drink anything.
- Before a meal.
- Two hours after a meal.
- At bedtime.
If you have type 1 diabetes, have type 2 diabetes and take insulin, or often have low blood sugar, your doctor may want you to check your blood sugar more often, such as before and after youre physically active.
Hyperosmolar Hyperglycemic Nonketotic Syndrome : A Complication Of Severe Hyperglycemia In Type 2 Diabetes
In people with type 2 diabetes, extreme hyperglycemia can lead to a very rare but serious condition called hyperosmolar hyperglycemic nonketotic syndrome, or HHNS). HHNS is most likely to occur when you’re sick particularly if you aren’t able to drink enough fluids or keep fluids down. It happens most often in elderly people and, like ketoacidosis, can result in a coma.
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Reduce Your Sugar Intake
The average American consumes 22 teaspoons of added sugar per day. That translates to around 350 calories .
While some of this is added as table sugar, most of it comes from processed and prepared foods, such as candy, cookies and sodas.
You have no nutritional need for added sugar like sucrose and high-fructose corn syrup. They are, in effect, just empty calories.
Your body breaks these simple sugars down very easily, causing an almost immediate spike in blood sugar.
Studies show that consuming sugars is associated with developing insulin resistance.
This is when the cells fail to respond as they should to the release of insulin, resulting in the body not being able to control blood sugar effectively .
In 2016, the US Food and Drug Administration changed the way foods have to be labeled in the US. Foods now have to display the amount of added sugars they contain in grams and as a percentage of the recommended daily maximum intake.
An alternative option to giving up sugar entirely is to replace it with sugar substitutes.
Summary:
Sugar is effectively empty calories. It causes an immediate blood sugar spike and high intake is associated with insulin resistance.
What To Think About When Your Blood Sugar Is High
High blood sugar can harm you. If your blood sugar is high, you need to know how to bring it down. If you have diabetes, here are some questions to ask yourself when your blood sugar is high:
- Are you eating right?
- Are you eating too much?
- Have you been following your diabetes meal plan?
- Did you have a meal or a snack with a lot of carbohydrates, starches, or simple sugars?
Are you taking your diabetes medicines correctly?
- Has your doctor changed your medicines?
- If you take insulin, have you been taking the correct dose? Is the insulin expired? Or has it been stored in a hot or cold place?
- Are you afraid of having low blood sugar? Is that causing you to eat too much or take too little insulin or other diabetes medicine?
- Have you injected insulin into a scar or overused area? Have you been rotating sites? Was the injection into a lump or numb spot under the skin?
What else has changed?
To prevent high blood sugar, you will need to:
- Follow your meal plan
- Take your diabetes medicines as instructed
You and your doctor will:
- Set a target goal for your blood sugar levels for different times during the day. This helps you manage your blood sugar.
If your blood sugar is higher than your goals over 3 days and you don’t know why, check your urine for ketones. Then call your health care provider.
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After You Have Low Blood Sugar
If your low blood sugar was mild , you can return to your normal activities once your blood sugar is back in its target range.
After you have low blood sugar, your early symptoms for low blood sugar are less noticeable for 48 to 72 hours. Be sure to check your blood sugar more often to keep it from getting too low again, especially before eating, physical activity, or driving a car.
If you used glucagon because of a severe low , immediately call your doctor for emergency medical treatment. If you have had lows several times close together , you should also tell you doctor. They may want to change your diabetes plan.
Complications Of High Blood Sugar
Diabetes is one of the main causes of high blood sugar levels, but there are other causes that can impact your blood glucose and your risk for hyperglycemia.
Hyperglycemia is the medical term for high blood sugar levels. You can have temporary spikes in blood sugar after eating a large meal or as a result of medication side effects. Chronically elevated blood sugar levels are dangerous and common in those with diabetes. Without treatment, you run the risk of a diabetic coma.
Ketoacidosis is a condition that develops when elevated blood glucose levels go untreated. Without glucose to use for fuel, your body begins to burn fat instead and produces ketones. When there are too many ketones in the blood, it will turn acidic, which can very quickly lead to ketoacidosis, a diabetic coma, and even death.
People without diabetes can develop a similar condition known as ketosis, but they can tolerate a certain level of ketones because inulin is still effectively working.
Diabetic hyperosmolar syndrome is another serious complication of high blood sugar. This is more common among individuals with type 2 diabetes and is triggered by an infection or illness.
As a result of the high blood sugar, your body tries to push out the excess glucose by passing it through your urine. Without treatment, this can result in life-threatening dehydration so prompt medical attention would be necessary.
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Normal Blood Sugar Levels Vs Hyperglycemia
If youve been diagnosed with diabetes, your endocrinologist will tell you what your target blood glucose levels are. Your levels may be different from what is usually considered as normal because of age, pregnancy, or other factors. You will be given two target levels, or ranges, one applying to when you haven’t eaten for a number of hours and one for after meals .
Why Are My Blood Sugars High In The Morning
Heres a simple plan for diagnosing the source of high blood sugars in the morning.
It takes a little bit of effort, but you probably only need to do it a few times to diagnose the issue.
The Somogyi Effect is less common than dawn phenomenon. To diagnose either of these phenomena, scientists recommend checking blood sugar levels for several nights, specifically between 3 a.m and 5 a.m.
Compare these three glucose values and find the pattern:
- If your blood sugar stayed steady overnight, but rose in the morning, you are likely experiencing dawn phenomenon.
- If your blood sugar rose steadily throughout the night, your morning glucose highs may be the result of your diet or exercise choices , or a sign that you may want to adjust your insulin and glucose-lowering medication regimen.
- If your blood sugar dipped low in the middle of the night, you may be experiencing Somogyi effect.
The best option is to use a continuous glucose monitoring system . This will give you an entire nights worth of blood sugar values, making it easy to identify what direction your blood sugar moved while you slept.
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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.
What Are The Signs Of High And Low Blood Sugar
The symptoms vary depending on whether you have hyperglycemia or hypoglycemia. Find out how to spot the warning signs and stabilize your glucose.
Alamy
One of the challenges of managing diabetes is maintaining consistent blood sugar levels. Even with diligence, some situations can cause high blood sugar, or hyperglycemia, while others can bring on low blood sugar, or hypoglycemia.
After all, its not just carbohydrate intake that influences the amount of glucose coursing through your bloodstream when you have type 2 diabetes. Emotional stress and certain medications can increase your blood sugar levels, and a boost in activity can cause it to drop, says Megan ONeill, CDCES, a medical science liaison for diabetes care at Abbott healthcare company in Monterey, California. Sometimes people experience a spike in their blood sugar early in the morning due to the dawn effect, a temporary surge of hormones that occurs as the body prepares to wake, according to the Cleveland Clinic.
For people with diabetes, managing blood glucose levels is especially important, ONeill says. Levels that are too low or high can result in complications that affect your kidneys, heart, and vision, reduce your quality of life, require expensive interventions, or even be fatal.
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- Between 80 and 130 milligrams per deciliter before meals
- Less than 180 mg/dL two hours after meals
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Broccoli And Broccoli Sprouts
Sulforaphane is a type of isothiocyanate that has blood-sugar-reducing properties.
This plant chemical is produced when broccoli is chopped or chewed due to a reaction between a glucosinolate compound called glucoraphanin and the enzyme myrosinase, both of which are concentrated in broccoli .
Test-tube, animal, and human studies have shown that sulforaphane-rich broccoli extract has powerful antidiabetic effects, helping enhance insulin sensitivity and reduce blood sugar and markers of oxidative stress .
Broccoli sprouts are concentrated sources of glucosinolates like glucoraphanin, and theyve been shown to help promote insulin sensitivity and reduce blood sugar levels in people with type 2 diabetes when supplemented as a powder or extract (
11 ).
Keep in mind that the best way to enhance the availability of sulforaphane is to enjoy broccoli and broccoli sprouts raw or lightly steamed, or to add active sources of myrosinase like mustard seed powder to cooked broccoli (