Excruciating Leg Pain Hobbled Her for Weeks. What Was Wrong? An M.R.I. ruled out the most common cause of sciatica. Then her rheumatologist asked about her asthma. Author: LISA SANDERS M.D. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)MoreClick to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Tumblr (Opens in new window)