I’m sorry. They seem to be awful. I get one or two a year, but EH gets them a lot. Lays potato chips, pineapple in any form, walnuts, whitening toothpaste are all triggers. Then it’s like a major depressive episode, and the BG goes nuts and he sleeps as if he was at 300 and can’t stay awake. It’s fascinating to have realized all the things that go together. I wouldn’t wish them on anybody. 
We have a young friend (12) who gets them from toothpaste with sodium laurel sulfate and he also has behavioral issues when they happen. Major meltdowns.
Anyhow, a bit off topic, but interesting EH isn’t alone AND that they jack with BG.