Highest Blood Sugar Reading?

By diabetesfree Latest Reply 2018-09-11 19:59:25 -0500
Started 2011-05-13 03:26:52 -0500

I am just curious as to how badly other people's blood sugar levels have gotten. I've had mine register at over 600 at times. In fact, my meter wouldn't even give me an exact reading. It just said "HI". Scary. So, what is the highest your blood glucose level has ever gotten, and did you require any medical attention?

366 replies

dexpa 2018-09-11 19:59:25 -0500 Report

I had a 918 for a month… Couldn't see.. thirsty as hell… I was peeing sugar.. went into a coma after the insulin started.. good times… Now my a1c is 5.9

darlin47 2018-05-18 00:17:52 -0500 Report

mine has got to 800 before . I asked my Dr what the highest reading he had seen and he said he had a girl that came through the ER and was reading over 1200 but was going in to a coma

Crb1948 2018-03-30 16:28:31 -0500 Report

Hi, mine isn’t that high but I had a niece whose blood sugar was 1200 at the time that’s as far as the tests could read. I know there was a young man whose went over 2400 a few years ago.

HeavenorHell 2017-12-15 17:09:12 -0600 Report

After a ERCP my sugar was normal around 104 within the next blood work I had was 2 weeks later it was 1340. They told me to go to a ER the ER was amazed I was walking and talking the only effect I felt was I could not see 2ft in front of me. Now they are saying I am diabetic I'm a little confused how it jumped so high so fast. I can not get answers everyone just tells me I am diabetic and the test that they do would prove that I was diabetic for 3 months because of the 1340 but I am stupid and they will not see my point nor give me answers. They just say that the ERCP did not cause any of this but they really cant explain what did. So now I have to take 4 shots a day and oral medication 2 times a day.

Anonymous 2017-05-27 13:22:31 -0500 Report

When I was diagnosed I was 11 and my parents thought I was sick and got me Sprite for me to drink and I was really thirsty so I drank it quite fast and peed a lot and was really sleepy and I one day I had to go to track practice and I was so thirsty but I had to wait to get a drink and after that I attempted to take a shower and the water burned my skin so we went to the hospital and they though is was my appendix and I went on a helicopter to a different town to remove it and they wouldn't let me drink anything I was so thirsty I went to the bathroom and drank out if the faucet they removed and I was still in pain so they tested my blood this was like 2 days after I was brought to the hospital so they tested my blood sugar and it was only like 1000 but Im sure it was higher 2 days before that and now my monitor doesnt read over about 500 just says hi so IDK

Diabetes Force
Diabetes Force 2017-03-26 14:01:16 -0500 Report

Several years after finding out that I had diabetes I went into a diabetic coma with a blood sugar reading of 1340mg/dL. I was hospitalized of course but the doctors said they don't know how I survived that episode. I have had pretty high blood sugars that have sent me into DKA but none that high since that episode.

dlagasse1963 2017-03-21 02:45:21 -0500 Report

In 2015 when I found out the hard way that I was diabetic, I was watching TV and I could not get out of my chair. My friend helped me up and convinced me to go to the hospital to get myself checked out. We got to the hospital , I tried to open the car door and could not even open the car door, two people had to pick me up to put me in a wheelchair, couldn't even stand up. The then took me into the hospital and my sugar and it was a little over eleven hundred. It took them three days of me in the hospital to get my sugar down to around 300. A lot of people said if I would have gone to bed instead of going to the hospital , I would have gone into a diabetic coma and there I might not come out of it. Nice way to find out that I am a diabetic isn't it.

Kittiebitty 2017-02-02 16:48:34 -0600 Report

My highest was 600-700s. I went to the ER the last time I had my blood sugar run that high and it was due to a bad reaction to the drug Xifaxan. My words started slurring and I couldn't form sentences. Otherwise, I am still uncontrolled in the diabetes world with blood sugars going into the 400s sometimes.

Type2Barber 2017-01-18 20:49:29 -0600 Report

I got diagnosed last summer at the ER.. I thought I was dehydrated.. (real thirsty and urinating every 20 min) not to mention rapid weight loss…The admitted me right away and told me my blood sugar level was 755 and they couldnt believe I was still walking.. I was in hospital 5 days and been working at losing weight and dieting ever since.

Camaro69 2016-10-06 20:51:15 -0500 Report

I had the symptoms for at least a year b4 the dr figured out I am ttype 1. The day he found it my sugar level was around 1350. He told me I should have died. I still have highs…not quite that bad anymore. I think the last really high level I had was 745.

MrsCDogg 2016-09-19 04:19:12 -0500 Report

The highest mine has gone is around 500. That was when I was diagnosed. The lowest it has been was 38 right after I went on insulin. That low was scary too. I'm working really hard to have normal blood sugars and get myself off of insulin. I'm convinced that Levemir helped me gain about 75lbs. I've now lost about 55lbs of that.

dexpa 2016-06-16 15:49:13 -0500 Report

i had the classic signs of diabetes thrust and having to pee every 15 20 mins my mouth also burned when i drank soda anyway i started to lose my sight and i walked my self into the er and i had a BS of 918 no coma no damage and now im normal reading is any ware from a low low like 58 to 140 and i pay close attention to what i eat and get out and move

BSBloodfather 2016-03-23 15:16:14 -0500 Report

My father was admitted to hospital with bs @ 1100 .. The Dr stated he never seen a patient with blood glucose levels this high that was still alive. Incase your wandering how. He consumed 8 , 2 liter bottles of soda pop in few hours.

cmr55 2015-11-07 22:19:07 -0600 Report

I ended up in ICU thinking I had the flu BS was 860. 5 days later came out a diabetic on inulin. Been off insulin 23 months. Was on insulin 3 1/2 years. When finally got to see an Endo took me of insulin and then says I should have been off 2 years earlier. I now go no higher then 180 that two hours after eating. Most times it is in the 140 two hours after eating. Most o the times fasting BS is no higher then 136.

BigRell40 2017-03-01 21:49:29 -0600 Report

What did you do to get off of the insulin? Im sore from hip to hip across my stomach from injections.

David4004 2015-11-02 13:41:58 -0600 Report

I used to have a meter that would register "HIGH" when blood sugars exceeded 600. But, the newer monitor I have now registers "HI" when blood sugars exceed 500. I'm a Type 1 Diabetic.

When I was first diagnosed with diabetes at the hospital following a severe high blood sugar episode of extreme thirst, vomiting, and passing out, I was told my blood sugar was over 800 mg/dl. Normal blood sugar is 80 to 150 mg/dl.

Outside of the hospital, I've had occasional "HIGH" episodes ("HI" with the newer monitor), but the highest registered blood sugar I can accurately recall was a reading of 590 mg/dl (on the older monitor).

I have other issues going on with me, so controlling diabetes is next to impossible for me. It's a long story.

I'm frequently over 300 mg/dl nearly every single day…and some days exceed 400 mg/dl. Like I said, I have other issues going on with me.

micsha 2015-10-30 11:37:11 -0500 Report

My "normal" seems to be around 160-170. I take it first thing in the morning and a friend told me it's always going to be higher first thing, so I don't worry about it.

A couple months ago, i had a bout with gastroenteritis and my BS shot up to 320. It's back down now, but it scared me.

In January, i had a surgery and it was the first time since I was diagnosed that my BS were well within the 100-130 range but that was on insulin AND metformin. I had hoped they'd stay that way, but they didn't.

Anonymous 2015-10-19 23:33:34 -0500 Report

I cared for my fiance who was diagnosed with diabetes type 2 last year after a spider bite. He was in ICU for five days and it was all a horrible whirlwind time. In ER his highest blood sugar was 880 and A1C was 14. His doctor never advised him he was prediabetic the previous month when he went for labwork results. It was plain as day on his chart but NO ONE told him. We live 240 miles apart in different cities, so I went and stayed with him for three weeks. We both learned as much as we could about diabetes, it's treatments, diet, exercises, medication, etc. He is a big man and went from 250 to 218 within three weeks. His BS went to below 130, and A1C to 5. I even lost weight too and my sugar was at 112! This week his new doctor was happy to announce his A1C was 5.8 and BS 130. He is on his own while I'm back at home. After I read all these posts, I have to say, God bless each and everyone of you. In my heart I wish I could take care of everyone and make things a little bit easier for you. Take very good care of yourself, follow your instructions, take your meds, do what is BEST for YOU, and keep faith, never let diabetes beat YOU, you are all so precious.

C-MARIE 2015-10-02 04:06:07 -0500 Report

I was at 500+ one time. I was at work and when I think back I was thirsty as all get out, and having to go to the bathroom. The one thing that grabbed my attention was I was dizzy, and having a hard time standing/walking. I left work early and went to a local ER. Then I was told my BS was sky high. I was given a dose of insulin by shot, and was told to do a follow-up, which I did. I have been treated with type 2 since 2013. I have been able to keep it down, but I have gotten to 278 not too long ago. I just go up and down and most likely due to not STICKING to the diet given. I am paying for it, believe me.

PanhandleExit 2015-11-06 17:58:50 -0600 Report

Sorry, No delete button

jayabee52 2015-11-06 23:36:32 -0600 Report

You can click edit and then highlight the posting you'd like to delete and then post a period or asterisk to make the words go away. If you wish to completely delete a post you will need to find the hidden "report" link to ask the admins to wipe it all out.

PanhandleExit 2015-11-06 17:58:36 -0600 Report

I've recently been diagnosed with diabetes, what do you mean by paying for it due to not sticking to the diet given you,

PanhandleExit 2015-11-06 17:58:06 -0600 Report

I've recently been diagnosed with diabetes, what do you mean by paying for it due to not sticking to the diet given you,

jimbolea 2015-09-27 13:40:30 -0500 Report

I went for a fall day picnic , needless to say in the Hospital with BS over 1200

C-MARIE 2015-10-02 04:07:33 -0500 Report

OMG!! I have never heard of anyone being this high. What is your BS normally? What did you have to do to get it down? [I hope you are ok]

Yuman 2015-09-05 18:21:18 -0500 Report

Last July I went into a diabetic coma after experiencing nausea, extreme thirst, etc. I coded out twice for a few minutes each time, wasn't expected to survive. My BG was over 1400. I came out without organ or brain damage, but to a traumatized family. People are counting on you, you owe it to yourself and the ones you love to make every effort to control your diabetes. Life is great!

Kalisiin 2015-07-05 14:43:05 -0500 Report

I was diagnosed with a fasting BG of 388. That is by far the highest reading I have ever gotten. (A1c was 13.2 at that point)

I did not get a meter until about 6 weeks after diagnosis…my PCP did not give me one, and I waited for my endo to give me one…or to instruct me to get one. and it took that long for me to get into my endo.

By that time, I had already seen my Dietician and had a complete metabolic workup done, and a diet/meal plan made up for me which I followed rigorously for a month before my first-ever endo appointment. On that day, I had a fasting BG of 126.

The highest reading I have ever personally attained from my meter is 151…and it was the subject of my very-first post here on DC, wondering why my BG had just gone crazy…when I had eaten nothing different than I normally ate. It was my first outlier reading.

I've learned a little since then, and have much more yet to learn. About a month ago, my A1c came back at 9.2 - about two months after diagnosis. I expect even better results next time.

These days, I am pulling fasting readings of 103. Morning readings seem to vary for me between a low, one morning, of 79…and a high of 111.

The short answer is that the highest reading I have ever gotten was 388…and I am NEVER GOING BACK THERE AGAIN.

Flutterkick 2015-08-04 08:28:01 -0500 Report

Congratulations, what an amazing story! You have improved hugely! Very inspiring. I'm curious if you would mind sharing your meal plan with me, please? I'm curious to see what it looks like.

Thank you :)
And again, incredible job!!

Kalisiin 2015-08-04 11:32:01 -0500 Report

OK…basically, I am a low-carber. My dietician made up a meal plan for me which included 1810 calories, and 160 grams of carbs. I have since adjusted his on my own, keeping the same calorie level, but aiming for 60-90 grams of carbs a day, and no more.
Most days, I achieve this.

In addition, I have begun to incorporate Dr. Fung's Intermittent Fasting technique. I now fast on Mondays and Thursdays. On those days, I go from dinner the previous night, till dinner of the fasting night, for a full 24-hour fast (example, Sunday dinner to Monday dinner is my Monday fast.)

When fasting, I am allowed my morning coffee, with Atkins Vanilla Shake used as creamer (no carbs!) and Stevia - I'm a bear if I do not get my morning coffee…and al lthe iced tea with nothing in it I want…plus the occasional Powerade Zero diluted 1/2 water, 1/2 Powerade, for the electrolytes…because I do continue my working out even on fasting days - in fact, working out while fasting is a great way to kick you body directly into ketosis.

I am going to incorporate 16:8 fasting on my other non-fasting days during the week, once I become accustomed to the 24-hour fasting days.

Eventually, my eating schedule will look like this:

Monday - 24-hour fast
Tuesday - 16:8 fast (16 hours fasting, eight hour eating window)
Wednesday - 16:8
Thursday - 24-hour fast
Friday - 16:8
Saturday - normal eating
Sunday - normal eating

the 16:8 fasts are accomplished by simply skipping breakfast on those days…nothing from dinner the previous night until lunch the next day…the same allowances as my 24-hour fasting apply.

The concept of Intermittent Fasting is that, if you lower the glucose in your body then you lower the insulin in your body. This allows your body to become more sensitive to insulin. The problem for a Type 2 like me is Insulin Insensitivity, so this makes sense. What does NOT make sense, to me…is dumping even more insulin into the system…when you're already insensitive to insulin. That is treating the symptom and not the problem…in a way, it is like treating an alcoholic with martinis!! Think about it…your body becomes more able to resist the effects of alcohol…same idea here. So it would seem taking insulin would make your body even better able to resist insulin…causing you to need more and more…and it is a vicious cycle. At least this is the theory underpinning Dr. Fung's approach.

In addition, I work out EVERY DAY, without fail (the only time I didn't was this past Thursday and then Sunday, because I was in a car sixteen hours driving between NC and Chicago)

I tend to walk now 5-6 miles a day. I split this up over two or three daily walks.

I am now off 2 out of three of my blood pressure meds, and I am over 0 pounds lighter than at diagnosis, and I could not even tell you the last time I pulled a sugar reading over 110, even post-prandial.

So that is basically what I am doing. I have incorporated elements of several different ideas, which seem to make sense to me, and built my own plan from it.

And I am not doing this on my own, my PCP, my endo, and a dietician are monitoring me. But this is key: They are monitoig and guiding me…steering me away from any bad ideas I might consider…but they are NOT directing, micromanaging, or lecturing me. I am the captain of my healthcare team, and we play it my way. Anyone not on board with my goals and desired methods can't be on my team.

My goals are to be below 200 pounds for the first time since high school, buy July 1 2016, fifteen months after diagnosis (I am well on pace to achieve this) - in addition, I will have fasting BG in the healthy range of 70-110, preferably below 90 - and I am pretty much achieving this already. I will also have an A1c below 6.5, preferably below 6.0. and I will also be off all medications related to my diabetes, and managing my condition with diet and exercise alone.

Those are my goals. In short, I wish to put my diabetes into remission. I will have diabetes…Diabetes WILL NOT HAVE ME!!

The Monk
The Monk 2016-08-04 14:38:20 -0500 Report

I would be careful advising people with diabetes to extreme diets fasting and no carb I think a balanced even diet is a better bet. Went on south beach diet kept carbs low lots of exercise good results. After 2 years blood sugar went crazy could not starve or exercise away now insulin dependent and eating even meals ease to control not happy with it but how it is now. Good luck.

Flutterkick 2015-08-04 11:43:53 -0500 Report

Thank you for your reply, and all the detail. I had to skip over all the fasting stuff, as I get easily triggered (eating disorder behaviors.) I was curious for the details of your meal plan though: what were you given for Breakfast, Lunch and Dinner and Snacks? Did the RD give you an exchange plan for each of those meals or…? please?

Thanks again for writing and for friending me :)

3050 2015-06-06 10:57:00 -0500 Report

i am newly diagnosed type 2. I am also the only person ever to have survived a blood sugar level of 3050 and survived.. thanx to st. vincent providence, portland Or.

Anonymous 2015-05-12 14:28:04 -0500 Report

When I was diagnosed with type 1 my blood sugar was 1253 and the doctors said I should have been dead or in a coma and he was sure I had brain swelling by now. I was 5 and a half the day before and so I sat up and ask for a pack of gummy bears out of a machine we had passed as the medics ran me down the hall on a bed. The doctor started freaking out and checked, there was nothing wrong with my brain and my health was perfect other than the diabetes. Thank God. Sense then I've been over 600 many times due to stressful teachers attacking me and accusing me of making my blood sugar go up.. Who makes their blood sugar go up to get out of school? An idiot! Because it makes you feel awful for weeks. I finally left school and did class online because stress was making my blood sugar sky rocket. I haven't been 600 sense. My blood sugar stays under 220 and that's my range. Between 150 and 220 is safe. But 400 and under don't scare me at all sense I've experienced much worse. The lowest I've ever been was when I was six years old I was playing outside and came in after a hour of playing and My level was 23. Scaring my mom to death all most, but I was fine with something to eat and some juice. I'm brittle diabetic and so playing and insulin drop my blood sugar fast and hard. To me, my diabetes is no big deal. I am very active and it rarely ever gets out of hand. A lot of mornings I wake up at 60 and eat and I balance 130 the rest of the day.

Shytype2 2015-03-29 19:05:34 -0500 Report

I'm new to all of this. When I started looking into info and diet changes my BG was running 165/170. The last week I had been doing better as my adv. was 130/135. Last 2 days it has went up back to 165/170, I have a nasty head and chest cold. I'm taking OC meds and sugarfree cough drops. My diet hasn't changed from the week before so is it the meds or just being sick in general? Any advice would be awesome as I'm lost right now.

Kalisiin 2015-07-05 14:47:11 -0500 Report

I suspect it may be your sickness causing a lack of normal activity. Activity tends to use up and absorb excess glucose in your blood.

At least that is my experience.

I suspect…sick as you are…you are NOT exercising as you normally might. Or even moving around much at all.

Shytype2 2015-03-29 19:20:57 -0500 Report

I'm sorry I thought I was posting somewhere else…I don't know how delete this I'm still trying to figure this all out.

Shytype2 2015-03-29 19:20:54 -0500 Report

I'm sorry I thought I was posting somewhere else…I don't know how delete this I'm still trying to figure this all out.

Shytype2 2015-03-29 19:20:46 -0500 Report

I'm sorry I thought I was posting somewhere else…I don't know how delete this I'm still trying to figure this all out.

SpouseConcern 2015-03-18 11:18:29 -0500 Report

Hi, my spouse regularly has a 400 blood sugar - Im worried about him.
Morning BS or after meals BS.

He is on insulin and takes oral medication too. He is 33.

jayabee52 2015-03-19 03:40:17 -0500 Report

Howdy SpouseConcern
What is he eating which brings his BG (blood glucose) level so high? Unfortunately unless he has a change of mind about his eating habits all your talking to him will have little effect. The best way to affect him is to draw him close and kiss and hug on him and whisper to and ask if he has his life insurance paid up and if he has his casket picked out as he may be using both sooner than he thinks. Tell him you will miss your special times together. That might get his attention.

My (now ex) wife pulled me into the our Pastor's office and threatened to divorce me if I didn't start taking care of my diabetes. I started and she didn't divorce me over that. Several years later she divorced me over other issues.

I pray you can get through to him. We guys sometimes have such thick skulls.


lilleyheidi 2015-03-19 01:41:51 -0500 Report

you should be concerned, 400 is definitely high. He should be in contact with his doctor as soon as possible. He may need a change in insulin or oral med dosage. Does he eat a proper (low carb) diet? Diet and exercise are the number 1 & 2 contributors to controlling diabetes. Please get him to his doctor as soon as you can, and if it goes much higher than that you might want to take him to the ER or at least call the doc or ER. Best of health to you and to him.

Kalisiin 2015-07-05 14:50:18 -0500 Report

I culd not deal with 400 BG levels. At 388 I had polydipsia so bad I thought I'd die…and I knew I didn't want to live even another month feeling like that.

Now, things are much better and I feel much better. And I want to live. Badly. Which is why I have adopted a low-carb diet. I try to keep my carbs under 100 a day, which is a bit of a challenge…I'd like to get to below 50 if I can.

For now, I am happy when I can manage to keep to about 1800 calories a day, and have the calorie breakdown be 25/25/50 carb/protein/fat.

Flutterkick 2015-08-04 08:40:38 -0500 Report

RE: getting polydipsia, even when my BS is below 100, I am massively thirsty. The first few weeks since my pre-diabetes diagnosis, it was off the hook. I was desperate for water when I woke up, and couldn't drink enough.

Is there a BS level at which your polydipsia kicks in, or do you feel that way even at low BS levels, please?

Anonymous 2015-03-02 12:45:15 -0600 Report

iv been 1500 without going into a coma that is when i fond out that i had diabetes i became a diabetic when i was 17 and a half it was two week be for my 18th birth day

Papanna 2015-02-10 03:46:48 -0600 Report

I am wonder most of members posted their Blodsugar FBS is more than 300 ? Isit any problems and or any complication arise and noticed ? My self is maximum for FBS is 155-160 and PPBS is maximum 180 noticed rearly generally My FBS is 98 -112 rearly 125-145 and PPBS is 110- 145 rearly 170-182

ssawyer57 2015-01-24 15:12:21 -0600 Report

When I was diagnosed a month ago my bg was 457 and my A1C was 11. I'm now on 1500mg of Metformin a day. My highest recently was 267 after I had pizza. No more pizza for me!!!

Q&A 2015-01-24 15:04:05 -0600 Report

My highest blood sugar was when I was first diagnosed, it was 777 and the doctor said " hey, you could play that in Vegas." Then I was rushed to Vanderbilt.

Beca1 2014-12-15 07:33:13 -0600 Report

This may sound like nothing but for me it blew me away. I am new to this so have been testing my BG levels for three months now, it goes from 108 to 166, I am on the cusp of pre-diabetic - type 2, but once I had 4 sips of beer with a meal and it shot up to 190. Another time I had 2 rootbeers along with salsa and chips and two tacos and my reading was 275. This is why it is so darn important to test your BG "before" and "after" a meal to see What that food and drinks are doing to your body. Too large of meals, too much carbs or sugar, even skipping meals, having inflammation in your body, being stressed or ill, fighting a cold, all affects our BG levels. So be very mindful of what, when, how you are eating or Not eating. If I were you get another monitor they are giving free ones out on this site and Amazon, your monitor could be glitchy. Hope this helps.

Yari63 2014-11-15 06:54:38 -0600 Report

My blood sugar level at diagnosis was recorded at 127 mmol/L or 2286 mg/dL on the 25/12/1996, memorable Christmas for a kid. While this isn't the highest I've heard of, it's definitely up there and I'm thankful I'm still here.

BreC 2014-11-06 17:22:33 -0600 Report

When I was first dx'd mine was 892 and my A1C was 17. The A1C chart only goes up to 13, or that is what I was told. I was admitted into hospital and given Coumadin shots.

Machetesgirl 2014-11-04 07:15:51 -0600 Report

right now i just tested my blood sugar and its over 600 i dont know what to do .i dont feel any different except for a little headache any suggestions

jayabee52 2014-11-04 10:27:15 -0600 Report

Howdy MG
A BG level above 600 is nothing to fool with. I would urge you to go to the ER ASAP. You could stroke out with such a high BG level.

My late wife would occasionally have BG levels over 600. We called the advise line for the hospital and they urged us to come in asap.
They put her on an intravenous insulin drip and we stayed there until her BG was in an acceptable range, and then was released. That was one long night for us both.

With a BG level that high one's blood thickens and can cause strokes or TIAs (ministrokes) so don't delay.

Praying for you!


Flutterkick 2015-08-04 08:38:27 -0500 Report

Hi James,

If someones BS is that high, in the meantime, til they get to the ER, is it a good idea to drink lots of water and to do a little aerobics (stepping forward and back, while swinging arms, etc.) to lower BS immediately?

I've been told that even doing a minute or two of aerobic movement like that can help a lot, as can water to thin out the blood quickly.

What say you?

Papanna 2015-02-10 03:54:19 -0600 Report

I think For FBS normal value given70-100 and PPBS 100-140 is normal value for the persons fordiabetic noticed FBS not more than 120-140 and PPBS not more than 160 this number no diabeti c complication like neuropathy BP increases retinpathyand heart attack kidney damages noticed if above numbersmore found there may be some complication starts it is good to take immediately Doctors advise andcheck up