Two years ago I suffered a burn on my face, arms, and neck. On my arms now around the outer edge of the burn scar is a rash. It itches a lot. I am not sure what this is and why is it showing up 2 years later.
I would visit your dermatologist and get a biopsy of the rash. Burn scars can eventually lead to skin cancer in rare cases. Without seeing the rash it is difficult to determine if the rash is related to the burn area or is just a new rash. You can try OTC Cortaid or Cortisone 10 but if there is no improvement in 10-14 days you must see your dermatologist.