Everyone occasionally feels blue or sad. But these feelings are usually short-lived and pass within a couple of days. When you have depression, it interferes with daily life and causes pain for both you and those who care about you. Depression is a common but serious illness.
People with depressive illnesses do not all experience the same symptoms. The severity, frequency, and duration of symptoms vary depending on the individual and his or her particular illness.
Signs and symptoms include:
http://publications.nice.org.uk/depression-cg90
Cognitive Behavioural Therapy via Solihull CBT can help with this in an average of 6-12 sessions and also covers Birmingham and the West Midlands