My son was born with a "bump" on the edge of his ear. The pediatrician said it could just be some cartilage that got smooshed out of place & told us to massage it to see if it moved back into place. He's 3 now & it hasn't changed. When he was close to 6 months the pediatrician mentioned surgery, but we weren't so sure about that. We were already growing attached to it & even more so now. We call it his elf ear, or vulcan, ear. :) (I have a much smaller bump on the inside of my ear. Not even my mom noticed it. I discovered it on my own when I was a kid. So this is probably why he has it too.)
We decided that we would let him decide when he got older, depending on whether kids teased him or not. We plan to homeschool him so hopefully it won't be as big a problem as it would in school. So far only a few older kids at church have even mentioned it & they were only curious about what it was. Of course, they are nice kids, too. Most people, even adults, don't notice it. He is just now starting to take notice of it at all, also. We just talk it up as something special about him. We've jokingly considered teaching him to tell others that he is part elf or vulcan. :) We let his hair grow out over his ears for quite a while between haircuts, so it is covered much of the time.
Honestly, besides our adoring his elf ear, we also decided against surgery because we doubt that our insurance will cover anything "cosmetic". Insurance companies will try to get out of paying if they can find any excuse, and we definitely cannot afford to pay for it ourselves. My advice is to enjoy it & let him decide if it becomes a problem. Also, try to build his self-confidence & make him proud of his uniqueness. He may turn out to be a very confident boy who can handle whatever comes his way. Hopefully. :) And if not, then do what you can to help him. But, in his case it could resolve itself in time too.