Hello, I am a 36 male; I have a hard lump on the lower right side of my rib cage. It has been there for some time now, it's abou

It would depend whether this lump was a part of the  bone or soft tissue - this would involve a physician to examine you.

Depending on what your physician finds, further imaging can be done with plain films or  CTscans.  If it is determined to be harmless, then you may be instructed simply to watch it.