Depression is a low mood that lasts for a significant amount of time. The severity of depression can vary: a mild depression might not stop you from doing your normal activities, although it can make them harder to do and things might not feel worthwhile; when depression is more severe it can leave you feeling suicidal and unable to function normally. Depression can have many causes – for some people there are clear triggers, but others can find it difficult to understand why they are depressed. It is thought that between 3 and 7 people out of every 100 will experience depression every year [1, 2]. Fortunately, there are many effective psychological and medical treatments for depression.