<s>[INST]I have a lump on my left side right below my ribs. Its been there for about a year. Some days it doesnt hurt at all and sometime it hirts really bad. Its thr sizr or a nickel I would say. If you push on it hurts sometimes. No color differance in the skin. And you can kinda see it just by looking at it[/INST]Welcome to Chat Doctor .1. It looks like a mass arising from the bone (ribs).2. Needs confirmation with the chest x-ray., to see if the ribs are involved.3. An ultrasound of the lesion to see the content of the lesion (solid/cystic/mixed) and the extensions.4. If not identified you may have to go for a CT for better evaluation.5. The cause should be found out. Take a near possible appointment and get the things initiate.6. As the mass/lump might complicate. Anything to ask ? Do not hesitate. Thank you.</s>