A number of things can trigger depression but it isn’t always clear whether you might be slipping into a depressive episode. The very early indications of mood change that could later develop into symptoms are called prodromes. Some of these are common and some are unique to the individual and can be thought of as your relapse signature.

The warning symptoms of depression may not be so easy to spot. Everyone is entitled to an off day or two and sometimes even after an episode of depression...