Joni Mitchell made her first-ever Grammys performance ... which she has spoken candidly about in the past – known as Morgellons disease. The little-known skin condition is characterised by ...

The musician sang one of her famous songs at the Grammys on Sunday She previously revealed she suffers from the skin ...

Joni's health woes span a lifetime of battling different conditions, from childhood polio to the mysterious Morgellons disease. In her youth, Mitchell contracted polio and was hospitalised for months.

Joni Mitchell CC is a Canadian-American singer ... She has also stated that she has Morgellons syndrome, which is a little-understood condition that causes sores to appear on the skin.

Over the weekend, Joni Mitchell performed at the Hollywood Bowl for her first show in L.A. in more than 28 years, treating the crowd to her hits including "Big Yellow Taxi," "A Case of You" and more.

Over the weekend, Joni Mitchell performed at the Hollywood Bowl ... retired from performing in 2009 when she was diagnosed with Morgellons Disease , and stepped away from the spotlight in 2015 ...