Actor Selma Blair suddenly exits from biggest show ''Dancing with the Stars" . Here is the reason why she  exits and when will join

 Recent MRI results are the reason behind her sudden exit from the show

Blair, revealed in 2018 that she has multiple sclerosis

 she said -"The results came back, and it just all adds up to I can't go on with the competition,"

Multiple sclerosis, is an unpredictable disease that impacts the central nervous system of humans body

 It impacts on the brain, spinal cord and optic nerves 

It can cause the body to suddenly experience numbness, tingling and pain in all parts of body.

In her diagnosis, Blair used a cane to help her walk.