Many people feel sad, lonely, irritable, and have low mood but this passes within a couple days. With clinical depression, these symptoms last longer and interfere with daily life. You may find that you cannot focus and concentrate like you once did before, or that you do not get as much pleasure or joy out of activities you once enjoyed. Some people who have clinical depression are unaware of what treatments are available while others never seek treatment.
However, the large majority of individuals who do seek treatment for clinical depression see an improvement in their lives and a reduction of symptoms.