Psychosomatic illness is when your mind and body are connected, so if you are worried or stressed about something, it can make your body feel uncomfortable or even cause physical symptoms. For example, if you're very worried about a test or an exam coming up, you can become so anxious that you get a stomachache. Another example is if you're really stressed out about work and you can't relax, it can make your head or neck hurt. It's important to find ways to manage your stress, like talking to a friend or counsellor, so that you don't experience physical symptoms.