I have a lump on my left ribcage ive had it for years it does not hurt to touch i think it might be a kind of tumor i sometimes worry but never act?

Evaluation: You need to see your doctor to be evaluated, to have X- ray/Ct to find the cause so be treated.

See a surgeon: From your brief history, this lump likely represents a benign tumor such as lipoma or other. For your peace of mind, I would recommend seeing a general surgeon for biopsy/excision, frequently done in office.

Lipoma?: A painless lump that is painless unchanged for years almost certainly is not serious or dangerous. Your chosen topic tag shows you aleady know about lipomas, which is a good bet if the bump is soft and mobile. There's probably no hurry to have it evaluated, unless it becomes painful or larger. Bring it to doctor's attention next time you get routine care. Or now, if still worried.

Next physical exam: Point this thing out to your physician. It's common to have a bump on one of the costochondral joints. They can grow funny when they're fusing. They mean nothing whatever. If it's been there for a long time, it's almost certainly nothing. But do show your physician.