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Nervous tension immediately tightens every muscle and nerve in the body and restricts the normal action and free and rhythmic flow of the various circulations. It holds the poisons in the body preventing their free exudation and by their presence creates more poisons.
The cause of a nervous breakdown is usually an excessive stress response by the body. They can also result from a chemical imbalance of neurotransmitters, substances that control brain and nerve signaling. Nervous breakdowns can happen to anyone, but are more likely if you have a personal history of anxiety disorders or if you are experiencing a period of high stress in your life.