Depression (mood)

Symptons
In the fields of psychology and psychiatry, the terms depression or depressed refer to both expected and pathologically chronic or severe levels of sadness, perceived helplessness, loss of interest or pleasure, and other related emotions and behaviours.
The Diagnostic and Statistical Manual of Mental Disorders (DSM) states that a depressed mood is often reported as feeling depressed, sad, helpless, and hopeless. In traditional colloquy, "depressed" is often synonymous with "sad," but both clinical and non-clinical depression can also refer to a conglomeration of more than one feeling.
Such a mixture can include (but is not limited to) anger, fear, anxiety, despair, guilt, apathy, and/or grief, in addition to what many people would describe as typical "sadness". It is harmful for the human body and can affect proper functioning of the brain. Extended depression can lead to suicidal tendencies.

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