Very High Blood Sugar (Hyperglycemia / Dangerous)

Hyperglycemia, which is more commonly known as high blood sugar, occurs when the body is incapable of shuttling glucose out of the bloodstream so it can be transferred to cells for use as energy. In most cases, this condition is only a problem for diabetic individuals because these people suffer from dysfunction of insulin, the hormone used by the body for regulating blood sugar levels.

Symptoms of Hyperglycemia

Symptoms of hyperglycemia usually take several weeks to develop and can involve:

  • Dry mouth and an unusual degree of thirst, which prompts the person to drink more water than normal. This condition is called polydipsia.
  • Polyuria, which refers to an increased frequency of urination, particularly during nighttime.
  • Polyphagia, which is an increase in both appetite and food consumption.
  • Irritability
  • Fatigue

More serious symptoms, which are generally caused by prolonged periods of high blood sugar causing damage to body tissues, often take longer to occur and can include:

  • Losing weight despite increased food intake
  • Kidney disorders
  • Blurry vision
  • Diminished hearing
  • Nerve damage, nerve pain and numbness or tingling in the extremities (peripheral neuropathy)
  • Cardiovascular diseases

Causes of Hyperglycemia

Individuals with diabetes are not able to convert blood sugar into energy either because on insufficient levels of insulin or because their insulin is simply not functioning correctly. This means that glucose stays in the bloodstream, resulting in high blood sugar levels. Diabetes takes two distinct forms: Type 1 and type 2.

Diagnosing and Treating Hyperglycemia

Diagnosing hyperglycemia is done by assessing symptoms and performing a simple blood glucose test. Depending on the severity of the condition and which type of diabetes the patient is diagnosed with, insulin and a variety of medication may be prescribed to help the person keep their blood sugar under control. Insulin comes in short, long and fast-acting forms, and a person suffering from type 1 diabetes is likely to be prescribed some combination of these.

Individuals who are either diagnosed with type 2 diabetes or are considered at risk for the disease are recommended to make alterations to their diet, lifestyle habits and exercise routine in order to lower blood sugar and keep it under control. These changes generally help to improve blood glucose control, individuals with type 2 diabetes may require medication eventually. These can include glitazones, acarbose, glucophage or sulphonylureas.

36 thoughts on “Very High Blood Sugar (Hyperglycemia / Dangerous)”

  1. I am diabetic type 2 and I would like to know about i check my sugar level after dinner and it was 453 mg and I will make an appointment with my doctor because I run out of medicine what should I do

    1. My reading is 22.7 boots chemist in peacocks centre woking has not delivered medication l have run out what can i do in the meantime?

    2. Aurora Rodriguez

      My blood sugar is always high and I have been taking metformin for about 4 years now and with time it has been changed to a much higher dose now. From 500 mg to 850 mg! I try to get some form of excersise and try to eat better.

  2. My blood sugar has been really high and I’m always tired and my doc apointment it’s not until the 20th war can I do to lower sugar

    1. I new to this condition myself, but I’ll will stop having bread, sodas, any form of sugar. Increase your veggies, potato, fruits… I see your posted this comment October 8, by now you already have been at your doctor. Good luck! let’s beat the disease !

      1. you might want to limit the potato, it’s a starchy vegetable, and your liver will convert all starches into sugar.

      2. No potatoe..pasta…or rice only in small amounts with meals because those all turn into sugar they are carbs…also fruit has alot of sugar as well….we have to start readibg packages…some items say No ADDED sugar meaning it has sugar so be careful and good luck…im still learning

  3. My blood sugar was diagnosed by my dr. 1 week ago at 416. I am on metformin twice a day and byduron once a week. What kind of general response should I expect in my blood sugar number?

    1. Theresa Rogers

      Metformin is very hard on your kidneys. My mom was on it for 5-6 yrs it has seriously damaged her kidneys.

      1. I heard bad things about Metformin, is there other oral medication for type 2 Diabetes? I’m feeling lower back pain, and I fear my pain is because of my Kidneys.

  4. My son is 9 .he just got diagnoses with diabetic type one…i need to be checking his sugar on dinner..well it was 313 .what can i do to lower it ….im new on this…80\150 is what he needs to be.

    1. Nedin, please call your son’s doc for advice on lowering his blood sugar. We can discuss diabetes issues, but no one should be giving medical advice. It’s unethical and can be very dangerous. I hope your son is doing well. This is a tough disease, especially type 1 in a child. Best of luck.

    1. Be good to yourself and curb the soda, alcohol intake, the fat and high carb as well.
      I just found out this morning my number and I feel terrible, but with discipline one day at the time.

  5. I went to the pharmacy this morning to purchase a kit to measure my blood sugar because for the past week I’ve been feeling very tired, thirsty, not been able to sleep, and having pain above my ankles. After having my breakfast (raw oats boiled
    with rice milk and water 1/2 teaspoon of cinnamon and teaspoon of raw sugar, as
    well as a smoothie with 1 banana and rice milk. Half an hour I tested my blood sugar
    and came 252, needless to say I feel devastated. . I don’t want to be dependent of medication but I will go to my doctor to have a complete check up. Sad, very sad.

    1. Oats, carbs, rice milk, carbs, raw sugar, carbs, banana, carbs, All carbs, how about some protein? a poached egg, and avocado, Turkey bacon, maybe a half an english muffin with a little butter. Lay off all the carbs and sugar.

  6. Ibrahim Chombinga

    My Dr. checked my blood sugar and found it (RBG – 21.7mmo/L while I had no history of such Diabetes Mellitus disease, it was around 1000Hrs. He instructed to use Glibeclamide and Metfomin both twice a day- Then he told me to go to his hospital early the next day before eating anything for second checkup. I went at 0800hrs and the blood sugar was found 3.7mmol/L.

  7. Katherine Anne O'nimus

    I am a very depressed type 1 diabetic. I just don’t care anymore. My blood sugar right now is 555. I know I should treat it, but I am just too depressed. I just don’t care anymore.

    1. Please don’t give up easy.
      Try to exercise, stop eating heavy foods, loose weight. We need to beat this disease !!

    2. It’s very sad my dear, i had a similar experience. Everytime this blood sugar keep rising despite all my efforts to bring it closer to normal but every time I check it’s going higher and higher 😭

  8. colette tamburo

    Hi pleassse dont say that i am a type one too and my numbers are in the 300s every night!!! Mine was 575!! So i know exactly how you feel and i cry all the time too. But your def not alone!!! ❤❤❤❤❤

  9. James e mcghee

    I have type 2 diabetes. Dr prescribed prednisone for unrelated condition. Can’t control sugar. Averages 200 – 334 in 8 hr span. What do I do to make me feel better.

  10. My blood glucose level was 132 I started experience and dieting for a week and then it becomes 153mg/dl im I deabetic ? What else can I do to bring my suger level down?

  11. I am 30 years old and was just told a week ago i am now type 2. My a1c was 70 my doctor wants to wait to put me on meds and check me in 3 months. I had guestional diabetes my daughters six months old. My levels have been ranging from 156 to 301. I have headaches all the time and no energy. I need some advice

  12. Low carb works, I was diagnosed April 2017 as type 2 after an a1c of 6.7 and FBG of 137. Started keto diet immediately now average blood glucose is 88-105 upon awakening and 2hrs after meals. I have also lost 27 lbs since March. Doc says I don’t need insulin meds. Also now off blood pressure med. what has worked for me: 20g of carbs daily come from vegs grown above ground, no grains, starches or sugars, lots of healthy fats, lots of water, moderate protein. I weigh everything before I eat it and use a keto diet app on my phone to track my diet.. I do a cardio workout at the gym as often as my work schedule will allow.
    I know a ketogenic diet is not for everyone but it is certainly working for me! I will be going back to for bloodwork in August, the numbers will be interesting to see.

  13. Good Day, Im a newbie! I had a real scare yesterday and especially today. I had blood work done 3 weeks ago today. I have TERRIBLE vericose veins and spider veins. The big garden hose like vericose started about 10 yrs ago in my thighs. From groin to knees. I had a very bad injury 3 years ago. Firecracker blew through my face. I was in. Hospital about 4 hrs away seeing a maxillofacial/oral surgeon, plastic surgeon and an opthalmologist (the best in the province​). Once realeased, We headed back home. I had been through hell. I was exhausted and fell asleep while my hubby drove. About 20-25 min before getting home, I woke up screaming in Pain and made him pull over. I could hardly walk. My thighs felt like the muscles were torn to shreds. It wasn’t good. I got back in, and we made it home. The next morning my feet looked like footballs and my shins were red, hot and shiny. I could sink index finger into shin to the second knuckle, and it stayed dented for hours. My feet were the same. I could barely walk. Saw Dr right away. Was put on. Lasix. I lost 25 lbs from a Thursday to Monday..4 days. So I guess I now have edema. I take lasix everyday. My flare ups aren’t as bad. However, these past three years, I have developed vascular disease. The vericose that’s started up top have spread around the back of my knees and down the sides and continue​s to spread. I had 2 spiders on each of my lower legs prior. But now they are covered in spiders, hairline veins, vericose, name it. My skin is dry and legs itch terribly.
    I saw the Dr a few times about them, but it really didn’t seem like he cared much. So I tried to have some spiders cauterized. Yeah right. That’s horrible pain burning through skin and burning tiny hairline veins (that don’t really bother me. It’s the bigger spiders that are sooo bad.Evsn the past year, it’s got 5x worse. I literally wake up to a new vein that’s surfaced. My only option is surgery. I have this in my family, so it is hereditary. Finally..I lost my cool and told him this is NOT normal. It should not get that bad in such a short time. I’m a 37 yr old female. And I wanted to know if there was something wrong with me to cause all the health problems I’m having. So, he sent me for a battery of blood work that afternoon. The lab said he would have the report in 2 days at latest. Well. Been 3 weeks with no word. I figured no news is good news..until I got the call that he wanted to see me asap. Lovely! The worst was a low blood count of white and red cells. AND my sugar was at 20!! I have never had sugar problems at all. I’m soooo scared. He said that he wants more tests because I didn’t look like someone with that level. He said I would be very sick and gaunt. But makeup works wonders too.
    Sorry for the long message, but,. I’m kinda scared. If my blood shows up at that level, that’s bad. Does that usually mean Someone is diabetic? I know a few ppl on metformin and insulin. But I do think there’s was that high when they found out. I don’t want anyone to sugar coat this. So on a scale of 1-10.. (1 -least likely, 10- most likely) to be a diabetic.


  15. dwight lambert

    be careful with the raw sugar & bananas. raw sugar is just plain sugar. bananas have less sugar the greener that they are. the riper the banana is the more sugar it contains

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