There are four types:
Relapsing-remitting. This is the most common form. You have flare-ups followed by periods without symptoms, called recovery.
Primary-progressive. With this type, you do not get the ups and downs. Your symptoms get worse over time.
Secondary-progressive. You get flares and recovery periods at the start, then symptoms steadily worsen.
Progressive-relapsing. This form is very rare. Symptoms worsen from the start. You experience...