Lump on sons left rib

alexandra

So ever since i can remember, my 3yr old has had a lump on his left rib cage, like on the very bottom. Its a hard lump, and it feels like if its just part of the rib, or might be a rib ??? Idk .. but a few days ago i noticed it more while i was showering him .. i’ll post a pic .. really dont know what it might be, i am taking him to the drs saturday when ny husband is hime since i dont have the car with me