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There is something called reactive hypoglycemia.

https://en.wikipedia.org/wiki/Reactive_hypoglycemia

It can occur for various reasons. Personally, I was developing adult onset type 1 (LADA) for a couple of years before I was diagnosed and I had all sorts of effects. While it was of course mainly effects of chronic hyperglycemia and shortage of insulin, I also had some episodes of hypoglycemia. Now that I’m on insulin, I’m very familiar with hypoglycemia resulting from an imbalance of exogenous insulin and carbohydrates. However, I looked back and realized this happened to me a few times before I was on insulin. I recall waking up a few times at night, sweating and shaking, and having a strong urge to consume food. I’d drink some juice or eat chips, feel better in 20-30 minutes and go back to sleep. This occurred after drinking alcohol, which makes sense as alcohol intensifies the effect of insulin and also prevents your body from releasing chemicals which raise your blood glucose level. I didn’t think much about it at the time but now I can see it was related to T1 onset.

My understanding is that essentially the body’s systems which regulate blood glucose are disrupted. This happens a with type 1 in general - not only problems with the system that produces and releases insulin to lower blood glucose by allowing it into cells, but also the part that does the opposite and release glucose to raise blood glucose levels. Sometimes the glucose-raising system doesn’t work at all while other times it’s inappropriately in overdrive. The same is true for the insulin releasing/glucose lowering system as it fails.