I used it on my tattoo because I had like an allergic reaction, like the bump you get from getting a piercing. Initially I thought it was an ingrown hair, so I went to an urgent care to remove the hair. There wasn't a hair and was told it was an allergic reaction, so I don't recall the proper name for this.
After a couple weeks of using this salve it went away to my amazement, was this a coincidence, I'm not sure. Either way it is completely gone.