See your doctor...but yoga does help. I have Lupus as well as Psoriatic Arthritis, the arthritis has affected my left sacro-iliac joint of my left leg. Move the wrong way and I feel a slipping sensation and excruciating pain. It actually cripples me (I sometimes use a stick). My doctor feels the yoga actually helped keep me supple and active. I don't do the same amount as I did when I was younger - but do try and incorporate it in every day.