Anxiety and stress typically lead to muscle tension. This is part of the body’s stress response to deal with future threats. Unfortunately, there typically isn’t a direct effect and stress is more harmful than helpful. If the muscles remain tense for long periods of time, they begin to spasm. Any muscle in the body can experience stress-related tension, and the severity differs from person to person. During periods of extreme stress, the muscles may become stiff and difficult to move. People may experience periods of extreme pain originating in the muscle.

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