Agreed. "hypoglycemia" is really the symptom, not the cause.

What I have appears to be a genetic disorder (my father and his father had it) that doesn't seem to be associated with any other health impacts. I recently realized that I should probably actually get the specifics pinned down, and that's something I'm going to work on in the future.

My understanding (through my father, who had his hypoglycemia tested when he was younger) is that my pancreas overreacts, putting out more insulin than is necessary for any given blood sugar level. It's particularly problematic when I consume simple sugars, as my pancreas drastically overshoots. The consequence is that, unless I eat slow-digesting foods every few hours, I feel cranky/exhausted/sad/impatient, get the shakes, and have general weakness in my muscles. If I continue to not eat, my emotional state stabilizes and I simply get really really tired. Not life threatening, but a serious interference with happiness/productivity.

But I will be looking more specifically into the causes, instead of my father's interpretation of his own diagnoses from forty years ago.