Secondary progressive multiple sclerosis (MS) is a form of MS in which symptoms are constant, do not improve, and may get increasingly worse. This is a result of steady damage to the nerves in the brain and the spinal cord.
The secondary progressive form of MS follows a phase known as relapsing-remitting MS, in which symptoms repeatedly appear or get worse, then improve. This cycle can repeat for many years before secondary progressive MS develops.
Medical Review:Adam Husney MD - Family Medicine & Anne C. Poinier MD - Internal Medicine & Andrew Swan MD, CCFP, FCFP - Family Medicine & Martin J. Gabica MD - Family Medicine & Barrie J. Hurwitz MD - Neurology & Karin M. Lindholm DO - Neurology