Written 7 years ago: (today's comments in parenthesis)
"In Jungian psychology, the "shadow", "Id", or "shadow aspect/archetype" may refer to an unconscious aspect of the personality which the conscious ego does not identify in itself, or the entirety of the unconscious, i.e., everything of which a person is not fully conscious. In short, the shadow is the unknown side." - Wikipedia
A process by which you seek root causes for your mal-adjustments and personality flaws, moods, anxiety, phobias, etc.
The Symptoms: Say you have certain triggers, things that make you cry or get angry or just go numb. For me two big ones originally were anything that challenged my beliefs in a way that made me out to be a liar, and songs that reminded me of my past. (I can honestly say now that these examples are alien to me, they haven't bothered me in many years.)
Sometimes you have moods out of nowhere, just mopey one day or irritated for no reason.
Out of control emotions.
Inability to handle certain situations. You shut down or go berserk.