I have a lumpy feeling costal, cartilage on my right side?

1 or more?: If just 1 area or more? If 1 it can b from an old injury developing arthritic changes. More evident if u r thin. If many & no injury may be a more generalized arthritic. The ccjct is actually a joint & a systemic process like RA could effect these joints as wellas others. If it is just there no pain or problem forget about it. Seek eval if symptomatic or 4 peace of mind.