I have developed two marks on my skin above the ankles, on both legs on the outer side. There is one on each leg and they appear darkish brown/black in colour. It looks like some sort of pigmentation but I don't know as to how it exactly happened or what caused it. The surprising thing is that it is on the outside of each leg and on both legs.
I would be thankful if anyone could enlighten me on as to what it is.