The experience of depression may arise from events that have happened in life. If you lose your job, or your relationship breaks up, or a member of your family dies period of being sad and lost is commonplace. But even so people can still struggle to find their way forward.
It often works in the shadows. You may not be fully aware of what’s happening. And it is important to realise that it not only affects you but your partner, children, your workmates, and your friends.