Nothing. I get keloids, which we found that out when I was 6 and started school. Back then we had to get a polio vaccine before attending school. So I was lucky to learn that before I had my ears done, or I'd have 4 more keloids, one each on the inside and outside of each ear lobe. I was such a pain for mom when a teen as I really wanted pierced ears. I did get another keloid on the back of a leg from a dog bite. Sigh.