If you have diabetes does that make you short tempered? and if so why?

Hypoglycemia (low blood sugar) = lack of glucose (fuel) to the brain = physical and emotional (mood) changes, particularly aggression. There is a distinct link, although not every hypoglycemic becomes violent, and not every violent person is hypoglycemic. A good article regarding how hypoglycemia affects your body is http://www.diabetesselfmanagement.com/ar... Source(s): I am in healthcare education. I have seen one individual hospitalized on a psychiatric ward for uncontrolled diabetes resulting in extreme aggression.

It probably will, especially if your blood sugar is way too low.
"Whoa?! I can't eat that?!! Awe, son of a .... What are you staring at?! What to make something of it, huh punk..." Grandma would all feisty like that. "Make cookies for undeserving brats and I can't have just one!" ... "Owe Grandma that hurts.."
I have diabetes type 2, and when my blood sugar is too high (not too low), I get tired. And when I'm tired, I'm grouchy and impatient.

When my blood sugar is too low, I just feel lightheaded and weak. It doesn't affect my mood much.
Experience
I think it does. I worked with someone who had Diabetes and he was a major asshole!