Anxiety comes in many forms. According to the National Institute of Mental Health as many as 40 million Americans suffer from an anxiety disorder (source, and more info here). When there is a real surge of anxiety, the afflicted person can end up virtually non-functional. The mental activity tends to go in a dangerous spiraling motion (thoughts of dread, regret, meaninglessness, etc.), the body may respond violently (trembling, vomiting), and a panic attack can set off totally paranoid behaviors (e.g., unable to leave the house). This is mind and this is serious stuff.

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