3 months old with a hard lump on the rib cage. No pain. Should I be worried?
I just noticed a hard lump on my baby s left rib cage, high up, possibly on the breast bone. It is toward his side slightly left and lower to his nipple . I never noticed it before. He is 3 months old. It doesn t seem to hurt him when I touch it. It worries me because it s not the same on the other side. It almost feels bony to me.