Irritable means easily annoyed or quick to become grumpy. When you're irritable, small things that normally wouldn't bother you suddenly feel frustrating. A little sister's humming might seem unbearably loud, or a friend's joke might strike you as annoying rather than funny.

Everyone becomes irritable sometimes, often for specific reasons. You might feel irritable when you're hungry, tired, or worried about something. Maybe you didn't sleep well, or you're nervous about an upcoming test. Athletes often get irritable during intense training because their bodies and minds are exhausted.

The key difference between being irritable and just being in a bad mood is the quickness of your reaction. An irritable person snaps at others more easily, like a mousetrap set too sensitively. Your normally patient grandfather might become irritable when his back hurts. Your cheerful friend might turn irritable after staying up too late.

Understanding when you're feeling irritable helps you recognize that your reactions might be exaggerated. Sometimes the solution is simple: eat a snack, take a break, or get some rest. Recognizing irritability in others helps too. When someone seems unusually grouchy, they might just be having an irritable day rather than actually being mad at you.