Clinical depression is a severe and prolonged feeling of sadness which seriously interferes with our psychological, emotional and social functioning. Sometimes there is an obvious cause, such as the failure of a marriage or relationship, job loss, financial problems or health problems. Sometimes there is no readily identifiable cause. Common symptoms of depression include feelings of hopelessness, worthlessness, loneliness, abandonment, pessimism, despair and even suicidal thoughts. Low motivation, a loss of interest in most activities, a lack of sexual desire, and social withdrawal, are other symptoms.
Depression sometimes causes disturbances of appetite and sleep patterns.
For some people appetite loss and insomnia may accompany depression. Others may overeat and sleep excessively. People who are depressed may be unable to motivate themselves to complete even the simplest task. There are many different possible forms of treatment for depression. These include various forms of psychotherapy and the use of anti-depressant medications.