I've had a vaccination done on me quite a few years ago. After that a hard, red lump appeared on my shoulder. Right now it doesn't hurt or itch, but it does bother me as it's pretty big and you could imagine it's not aesthetically pleasing. I've talked to my doctor about it but they keep insisting it will go away "in a year". I want to know if it will really someday go away, because I've seen no light in the tunnel just yet - 5 years later. Thank you in advance!