We all know what it's like to feel stressed, but it's not easy to pin down exactly what stress means. When we say things like "this is stressful" or "I'm stressed", we might be talking about:

• Situations or events that put pressure on us – for example, times where we have lots to do and think about or don't have much control over what happens.
• Our reaction to being placed under pressure – the feelings we get when we have demands placed on us that we find difficult to cope with. 

It's overwhelming. Sometimes you can't see beyond the thick fog of stress. There's no medical definition of stress, and health care professionals often disagree over whether stress is the cause of problems or the result of them. This can make it difficult for you to work out what causes your feelings of stress, or how to deal with them. But whatever your personal definition of stress is, it's likely that you can learn to manage your stress better by:

• Managing external pressures, so stressful situations don't seem to happen to you quite so often
• Developing your emotional resilience, so you're better at coping with tough situations when they do happen.

 Is stress a mental health problem? Being under pressure is a normal part of life. It can be a useful drive that helps you take action, feel more energized and get results. But if you often become overwhelmed by stress, these feelings could start to be a problem for you. Stress isn't a psychiatric diagnosis, but it's closely linked to your mental health in two important ways: 4 5 • Stress can cause mental health problems, and make existing problems worse. For example, if you often struggle to manage feelings of stress, you might develop a mental health problem like anxiety or depression. • Mental health problems can cause stress. You might find coping with the day-to-day symptoms of your mental health problem, as well as potentially need to manage medication, heath care appointments or treatments can become extra sources of stress. This can start to feel like a vicious circle, and it might be hard to see where stress ends and your mental health problem begins. (See our booklet Understanding mental health problems for more information on mental health.) [When I’m stressed] I feel like I’m on the verge of a breakdown. Why does stress affect me physically? You might find that your first clues about being stressed are physical signs, like tiredness, headaches or an upset stomach. This could be because when we feel stressed emotionally, our bodies release hormones called cortisol and adrenaline. This is the body’s automatic way of preparing to respond to a threat (sometimes called the 'fight or flight' response). If you’re often stressed then you’re probably producing high levels of these hormones, which can make you feel physically unwell and could affect your health in the longer term.

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