My daughter has a skin lesion on her one ear. It is red and inflamed and crusty. The doctor put her on Keflex and told her to return in on week. If it is not any better she may have to go to a specialist. She had her ear cartilaage pierced over on e year ago but has let it grow shut dut to sports in high school. Could this possibly be an infection from that long ago or just some type of skin cancer?? Any information would be appreciated.