<s>[INST] Hi, 2 years ago I broke some ribs on my right side of my body.  Now it seems like a hard deposit is left looking like a hard lump on my rib cage.  I have no pain, no trouble breathing, but it just seems to be aggravated if I lay on my stomach for a period of time?  Is this normal or no. [/INST] Hi,This is likely to be callous formation which is normal after fractured ribs. It is the bony and fibrous tissue that forms around a fracture site. You may feel the lump or swelling but it is nothing to worry about. It may remain for a long time and will not cause a problem. Regards,Dr K A Pottinger </s>