It's normal to have days or weeks when things aren't going right. You may feel unhappy or lose interest and enjoyment in everyday activities.
Depression is when these feelings don't go away quickly and start to interfere with your everyday life. If you’ve had symptoms almost every day for two weeks or more, it’s likely that you’ll be diagnosed with depression.
Around one in 10 adults in the UK will have depression at some point in their lives. On average, depression can last for six to eight months – but it can last up to two years. You may have more than one period (or episode) of depression in your life.
Depression is a clinical diagnosis. People may use the word ‘depressed’ to mean that they’re low or sad. Clinical depression can feel very different to everyday sadness.