Is it painful? Is the skin an abnormal color etc over the lump? Is it soft, hard, mobile etc.Is it actual underneath the rib bone or it under the skin, over the rib where you can feel it?JACUSTOMER-stp4davx- :it is not painful...uncomfortable and no color change in skin...feels hard to me but due to the location,its hard to really tell if its mobile.under the rib bone in my back. it does give some dis comfort when lying on it though. left waistRickMD :Ok. So, it is not something that you or a partner could feel since it is under (on the lung side) of your ribs, is that correct?JACUSTOMER-stp4davx- :we can feel it yes... it is the size of a golf ball i would say. if you were to press underneath my rib cage on my back left side you can feel it very wellRickMD :I don't think I understand where it is yet. Is this lump something that you do not have to reach up under a rib to feel, such as it is under the skin and you could see this lump with your eyes and touch it with you fingers?This is harder using chat then face to face in the office :)JACUSTOMER-stp4davx- :it is located right at the bottom rib on my left back..lumbar area i guessi dont have medical insurance so this is why i am here in this chat.RickMD :I understand but from your description it is hard to get a picture in my mind of where this bump is.A bump under the ribs would be impossible to touch or see. Are you saying that you feel like something is under your ribs in this area when you lay down, breathe etc.But, can your partner actually see a bump with their eyes and grab this golfball bump with their finger without digging under your ribs?JACUSTOMER-stp4davx- :ok...if you were looking at my back...and put your hands at the bottom rib on my left side...lumbar area and put your fingers under my lowest rib...close to my hip it is under that ribyes he can feel it..not see it as it is under the rib.RickMD :Ok. Got it. What symptoms did you have that made you discover this bump?JACUSTOMER-stp4davx- :About two weeks ago it became noticeable to me when i laid on my left side...it does not cause me pain but it is def uncomfortable. and i asked my husband to feel it and he was like OMG what is that? there is not one on the other side and i am very worried about cancer or something. it is large enough to feel easily. it aches but no severe pain as of yetRickMD :Well, I share your concern. There is no normal anatomical reason for a lump to be present in this area. A painless lump under a rib is something that needs to be evaluated sooner rather than later.I realize that you do not have health insurance right now. That being said, delay in workup for this rather large mass is unwise.JACUSTOMER-stp4davx- :ok...so what could it possibly be?RickMD :Could it be cancer? Yes. Could it be a cyst that is not dangerous? Yes. Should you wait to see a doctor until you get insurance? Absolutely not.It might be a growth on the rib itself, it could be from lymphoma, a metastatic cancer, an encysted infection.......lot of things.As you have already seen, with chat as my only diagnostic "tool" it is hard to even figure out where it is, let alone evaluated how it feels, moves, looks, exactly where it is etc. If I could do this I would be able to reasonably narrow down the possibilities for you.JACUSTOMER-stp4davx- :ok...yes those are all things i read on the internet.....i guess i was hoping for a more definitive answer here....yes please narrow it down if you could'RickMD :But at this point I would think the very worst -- cancer -- and hope for the best -- lipoma or cyst.My first thought is cancer.....but I didn't want to say that.I hope you understand the limitations I am under here on the internet :(JACUSTOMER-stp4davx- :yes and thank youRickMD :I wish you the very best.