Psychological depression is considered as a mental illness affecting the cognitive health condition which causes person to have a pronounced poor mood and low level of energy as well as unable to feel satisfaction or pleasure. This condition is medically referred as anhedonia.
Diagnosing depression is one way of evaluating the person who has psychological problems which may seek help from a depression therapist to successfully prevent the patient from having suicidal ideation.
In diagnosing depression, the psychiatrist uses observational examinations to evaluate the person who are suspected to suffer from this mental illness. Usually, aside from psychiatrists, other trained mental health professionals can confirm the diagnosis of the person.