The definition of spasticity reads like a description from a medical school textbook, but the National Multiple Sclerosis Society (NMSS) calls it a “feeling of stiffness” as well as “involuntary muscle spasms” or “sustained muscle contractions or sudden movements.”
These symptoms may be as mild as simple muscle tightness, but they may become severe enough to produce painful muscle spasms as well as pain and stiffness in and around the joints.
Spasticity has been estimated to affect anywhere from 30 to 80 percent of people with MS. It most often impacts the legs in those with MS, often producing problems with balance and strength.
Still, the degree of spasticity, the muscles involved, and the resulting impairments vary from person to person, according to Alexius Enrique G. Sandoval, MD, medical director of the Multiple Sclerosis Rehabilitation Program at Johns Hopkins Medicine in Baltimore. To read this whole article click here: https://www.everydayhealth.com/multiple-sclerosis/symptoms/muscle-spasticity/