Why do I acquire grumpy if I don't drink when I'm hungry?

I find my mood is bad, and I get hold of irritated if I don't eat when I'm hungry.
I also draw from headaches if it go past a spot on point when I don't eat. When I do munch through, the headache won't go away, and the single way to achieve rid of the headache is to go to sleep.
Does anyone know what this is call?Why do I acquire grumpy if I don't drink when I'm hungry?
I would say low blood sugar. You enjoy to eat to preserve yourself healthy. You may be contained by the first stages of developing diabetes. You should have a glucose theory test.
low blood sugar~ most likely.