After months of experiencing a ‘mysterious illness’ Third Rock actor Kristen Johnston was diagnosed with lupus myelitis (a type of Lupus that afflicts the spinal cord).

It was only after her official diagnosis that the actress took to Facebook in December 2013 to share with her fans the news and breadth of her symptoms, which included 'full body muscle weakness.'  'I've been really, really sick since early September... Full body muscle weakness to the extent that just walking difficult, stairs impossible and I even need a neck brace to hold my head up,' the actress shared online.

The symptoms became so much that Kristen - who currently stars as divorce attorney Holly Franklin on the TV Land comedy The Exes - was forced to take some time off from her role.