The symptoms of clinical depression make it hard for you to function normally. It lasts for at least 2 weeks and, without treatment, usually much longer. The exact cause of depression is unknown. It appears to result from a biochemical imbalance in certain parts of the brain. In many cases it appears to run in families.
Depressed people have a hard time maintaining normal relationships.
As a result, problems with relating to others often develop or worsen. To diagnose depression, your doctor reviews your symptoms with you and sometimes with someone close to you. He or she may also examine you. In addition, the doctor will try to find out whether drug or alcohol abuse or a medical illness may be adding to your depression. It is unwise to try to overcome depression by yourself.