text: tattoo concern? i have recently (1 month ago) gotten a tattoo.  it seamed to have healed fine, like all the others i've gotten.  but just suddenly 1 1/2 weeks ago the purple color (only) has had a rash, all over the color.  all the other colors are fine but the purple parts are all rashed out.  what could this be and how can it be treated? some people are allergic to certain colors...  usually reds.  try a over the counter cream, like hydrocortisone.  if this doesnt work, i hate to say it.. but it may need to be removed.