For a number of years now, I have been getting dark patches on the shin area of my legs and ankles. I first noticed small red spots which eventually turned brown and remained. The skin does not itch and has no different feel to it; it's just spotted. The largest spot is approximately 3" long by 1-1/2" wide.
I have seen a dermatologist who didn't seem to know the cause. He prescribed some creams which didn't have any affect on the progression of these spots. He also told me the brown patches remaining on the skin were sort of "tatoos" on the skin from the iron in my blood.
I am a 64-year-old female and maybe this is another fact of aging. I had Scarlet Fever when I was a small child and I'm wondering if this may be a factor in these spots.