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Involuntary muscle spasms, usually in the legs.

Spasticity is a symptom of MS that causes muscles to feel stiff, heavy and  difficult to move. It exists on a scale: from relatively mild, with feelings of tightness in muscles and joints; to very severe, producing uncontrollable spasms, usually in the legs.

MS Trust. Spasticity and spasms. Available at: Accessed April 2020.

UK | July 2020 | MUL20-C021