The impact of circumstances may cause a perfectly normal person to feel depressed, as in the death of a loved one, disappointment in romance, business failure, or enforced inactivity because of accident or illness.
In persons with neurotic inclinations. depression is typically greater than the aggravating factor would seem to justify. The depression, then, may satisfy a subconscious need for personal attention or sympathy. In such persons the symptom of depression may be quite incapacitating and may require specific treatment.
Depression also occurs as a prominent symptom in most mental illnesses. Here psychiatric treatment is advisable.