I got a piercing through the thickest part of my ear cartlidge unprofessionally. The earring sort of came through the skin in the back. I went to a piercing artist and he said that it was fine. But now it has a bubble like thing over where it used to show and it lloks like it might be filled with blood...Worrieddd.
Is it tender or warm to the touch? If so, it could be infected. You'd need to see your family doctor and probably have some antibiotics to clear it up.