[jaggederest]

Epinephrine causes the body to release sugar into the bloodstream - it's one of the reasons you get shaky when your blood sugar gets low (if you're not T1DM at least) - your body is attempting to increase blood sugar by epinephrine. So in reverse, stressful situations that cause the release of epinephrine increase blood sugar.

There's a similar issue with e.g. running as a T1DM (as I understand it, not being one) - when you're running, your body will pump out sugar, but when you stop running, it doesn't stop instantly, so your blood sugar can spike high post-exercise. Or you can run out of sugar and crash hypoglycemic.

It's amazing that CGMs exist that can, to some degree, compensate for these things, but man the body's autoregulation on 50 different axes is fascinating.