[Cinnabon]

When the body doesn't have enough insulin, the cells that need sugar for energy cannot get the sugar easily. Therefore your body will not be working as efficiently as it should be. Anything that requires "extra" energy may be harder if blood sugar levels are high. People may not have as much energy as usual, and they may get tired more quickly with exercise. If a person is in a good mood, high blood sugar levels will not put them in a bad mood. But if the person is already in a bad mood - high blood sugar levels may make the person more irritable.

But - the feelings of irritability can be controlled by making a conscious effort to stay in control. High blood sugar levels do NOT cause people to be "out of control" - it just means the person may have to make more effort to stay in control. This is similar to times a person has a headache, or is worried about something - they may be more irritable, but they can stay in control with extra effort.