Oh my God! I have come down with a condition called costochondritis. And I've had it for almost 2 weeks and let me tell you the pain is relentless. I'm only posting in this group because I've discovered that it is something not that unrelatable to PMR. A very informed PMR patient told me that it is common with people who have rheumatoid arthritis or Ankylosing spondylitis both of which are also common with people who have PMR. I would love to hear from anyone else that has had this condition.