Why are my blood sugar levels spiking high after corrections and meals?

CoreyCharman

CoreyCharman

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Type of diabetes
Type 1
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Hi guys, I’m needing a little bit of advice. Last night as I was driving home from work my libre alarm went off telling me I was at 56. I had all the symptoms of a low, so I corrected with one pack of a Mott’s fruit snack. 19g of carbohydrates. Within 20 minutes my blood sugar had shot up to 247. Which is not usual when I correct. I took my 50 units of Tresiba before bed and took a correction dose of 3 units with my humalog. When I woke up this morning my blood sugar showed high and out of range (which means it’s above 400). I took 10 units this morning, and after 3 hours it was still at high, so I took 10 more and it’s just coming down into the 300’s. But I don’t understand how it could be that high after not eating or drinking anything but water.

I am seeing a huge reaction after meal times. For example a few days ago I ate a protein bar with 30g of carbohydrates. I took 8 units of insulin 20 minutes before I ate it. My blood surgar skyrocketed to 384 within minutes and stayed there for over two hours but then shot down to the low 60s. And going to such extremes keeps giving me headaches. Any advice on how to prevent this from happening?
 
EllieM

EllieM

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Hi @CoreyCharman forum rules mean I can't give medical advice but here are some thoughts based on my own experiences.

Firstly, are those bg levels from a cgm (libre/dexcom etc) or a glucometer? Sometimes cgms can read off and be very misleading. eg I've had mine read falsely low, corrected and ended up massively high.

When my bgs are high (over 200mg/dL) I tend to find I need a lot more insulin to get them down as my insulin resistance goes up.

Any chance you're coming down with some sort of infection? Illness always messes things up for me.

Have you done any basal rate testing recently? Insulin needs can change with time, illness, exercise or even the weather. If my basal rates are wrong then I find it hard to get anything else right.

A final translation note: I assume you are using mg/dL which is fine. If you want to convert between mmol/L as used by many of the posters here , you'll need to divide or multiply by 18.

Good luck.
 
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