I recently noticed a large to medium sized lump under my right rib cage
I am 14 years of age, do not have parents that smoke, I have been working out (crunches and sit ups) and have had no previous liver problems. I have however had kidney surgery at a young age, but I doubt that would effect things.
It is not noticeable unless i tense up. It is not hard to the touch but I cannot feel it as it is under the rib. It is about 15 cm up from my belly button.
im not sure what it is and I would appreciate any help