Hi my name is nona i have had this symtom you are describing i dont remember what the medical term is but it is the cartlidge that holds your ribs together it becomes inflammed in active lupus i have this alot and my rhumey tells me that is a sign that you have very active inflamation going on but please ask your doc to be sure but i know that it is very uncomfortable it actually keeps me home alot because i cant stand to wear a bra when it is really bad i hope this helps some and of course i hope you get some relief soon
i have lupus rhumatoid arthritis lupus induced heart kidney and brain disease bulging and degenerative spine ,autoimmune hepatitis.