Since I recently posted about my Personal Best for Lowest Low, I figured I would address the higher side. Now, there's some misconception that High BG levels aren't as bad as Low BG levels. While that is true in the immediate sense - extreme lows can cause death faster that highs - High BGs are never something to brag about. High BG levels can cause muscle cramps, your organs to fail, and have long-term consequences on your health (see literally pamphlet about High BG levels). I have heard T1Ds brag about their High BGs at Diabetes Camp but looking back, it was an incredibly stupid thing to brag about.
My highest high that I've had (outside of hospitalization/diagnosis) was 620 mg/dL. I was super high because my pump that the time had stopped pumping and it made me feel crummy all day. This Personal Best was back in high school when hormones and emotions are already running wild so I didn't immediately know what was going on. I did have a back up means at the time too which doesn't make me any smarter. I noticed the high when I felt like my muscles were getting exceedingly tight throughout the day, I started peeing WAY too often to be considered normal, any my vision went super blurry. I knew something was up and I was still apprehensive to test my BG.
Slightly-Deep Thought - There was a point for me, in my head, where I could tell my BG levels were getting out of hand and I simply did not want to address it. I don't think there is a proper means of describing that feeling (but I will attempt). I wasn't giving up, I didn't hate my Diabetes, I wasn't trying to be 'too cool' to check - I believe I was feeling indifferent about feeling my symptoms. Now, this may be a feeling all-too-common for T1Ds in High School where you're developing into a 'real adult' and the responsibilities overwhelm you. It's certainly not that we enjoy feeling terrible, it might be that we are disconnected from any action. I knew that I could fix things and feel better but this was an occasion (happens rarely) where I didn't care. It's terrifying from an outsiders' perspective and even my perspective now 13 years later but it made perfect sense when I was 15.
So I felt terrible - went home after school and tested. I was super high and my meter at the time didn't just give the notification of HIGH (that's how I read the 620 mg/dL). I didn't have ketones but still felt like my body was consuming itself. Gave my self a solid dose of Humalog and a couple hours later I saw my blood glucose drop to 300 mg/dL (It always takes longer than you think). Never in my life had I been so happy to see 300 mg/dL. A few more hours later we were back in the range.
Highs happen - seemingly more often than lows for some people. Insulin fixes it (duh) and sometimes we'll be too angsty to do anything about it.