Stress is what you feel when you are worried or uncomfortable about something. This worry in your mind can make your body feel bad. You may feel angry, frustrated, scared, or afraid — which can give you a stomach ache or a head ache.

When you're stressed you may not feel like sleeping or eating, or you might sleep or eat too much. You also may feel cranky or have trouble paying attention at school and remembering things at home.

There are lots of reasons you might feel stressed, for example worry about exams, difficulties in school or with your friends or problems at home.