All I can say is that you are not alone- I too get RAGING angry and it literally takes all my focus and control to not physically act out on it. My husband of 10 years did not believe it was my blood sugar. Neither did my doctor or counselor. (which makes me rage all by itself!)

My suggestion is that you must treat food like a medicine. There is no hecticness (is that a word?) that should take place of you taking care of yourself. Always eat complex carbs with a protein--even if it's just a little snack--the combo will make you feel full longer. You already know that going low on your blood sugar makes you feel crazy, and that's good to know cause you can work toward eating *before* the rage starts. Make managing your blood sugar top priority--use google like crazy and gather as much info as you can. It ain't easy and the feelings of isolation make it all the more terrible. But you are NOT alone, and you are NOT crazy.

Such crashes makes me extremely aggressive, expecially with objects. I have noticed that people who become very aggressive as a result of biochemical disequilibrium, are otherwise very sensitive people who would never hurt an ant. It's the case for me. I have never hurted anyone or hit whatever person, I hate violence and can't even stand violent movies. Yet I get uncredibly aggressive and angry when my blood sugar swing happily. Irritability is the worse: when even the voice of someone you love gets on your nerve for no reason at all.

I have been suffering from hypoglycemia since I was 7 and I remember at age 8 getting angry almost daily to the point of tears just from watching "stupid" commercials that made me angry. I also got angry to people in motorcycle and to comic movies without any reason. A lot of things made me mad and only after my diagnosis of hypoglycemia I began understanding why and all the strange feelings I had as a child.

The good thing is that the more aggressive you're on a sugar disiquilibrium, the more balanced you discover to be once your blood sugar is on an equilibrium, it's a wonderful sensation and you will attract more friends and great opportunities than ever. You'll also realize that you probably are more capable of loving life, people and being in awe with this beautiful world than other people can.

There's a book about a woman who was diagnosed as mentally ill and put on a cocktail of dangerous psycho drugs. Her life was miserable and she was suicidal. It was reactive hypoglycemia from the beginning. Your girlfriend should read that book.