Depression
Depression is more than simply feeling unhappy or fed up for a few days. With true depression, you have a low mood and other symptoms each day for at least two weeks. Symptoms can also become severe enough to interfere with normal day-to-day activities.
About 2 in 3 adults have depression at some time in their life. Sometimes it is mild or lasts just a few weeks. However, an episode of depression serious enough to require treatment occurs in about 1 in 4 women and 1 in 10 men at some point in their lives. Some people have two or more episodes of depression at various times in their life.
Further information can be found at the following websites: