When caffeine puts your brain and body into this hyper-aroused state, your emotions overrun your behavior. Irritability and anxiety are the most commonly seen emotional effects of caffeine, but caffeine enables all of your emotions to take charge.

Can caffeine make you irritable?

Caffeine does have its cognitive perks — including boosting alertness, energy and feelings of well-being — but overuse can cause a range of unpleasant side effects, including troubled sleep, jitters, irritability and gastric distress.

Does caffeine cause short temper?

It affects your mood

It's even been shown to help with depression. But just like before, it's all about getting the balance right. Too much coffee can make you short tempered, irritable and down.