The types of MS include relapsing-remitting MS (RRMS), secondary-progressive MS (SPMS), primary-progressive MS (PPMS), and progressive-relapsing MS (PRMS). Each type has its own unique pattern of progression.
Relapsing-remitting MS (RRMS)
RRMS accounts for about 85% of all initial MS diagnoses. People with RRMS have isolated relapses. When not having a relapse, someone with RRMS is partially or completely without symptoms.
Secondary-progressive MS (SPMS)
About 50% of people with RRMS develop SPMS. This happens gradually, usually within 10 years of the initial MS diagnosis. People with SPMS have fewer and fewer relapses, but begin to have constant, steadily worsening symptoms.
Primary-progressive MS (PPMS)
PPMS accounts for about 10% of MS diagnoses. This type of MS is characterized by a slow and steady worsening of symptoms. There are relapses in PPMS, but the worsening of symptoms may occasionally speed up, slow down, or even get better for a time.
Progressive-relapsing MS (PRMS)
PRMS affects about 5% of people with MS. It is characterized by steady worsening of symptoms and occasional relapses.
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