Skin discoloration

[Billie]

I'm assuming there's alot of members here who know as much about certain deficiencies and such as much as fitness/health.

So I was wondering if somebody could help me get an idea as to what my problem is...It's not a big deal though.
Recently (maybe for the past couple months) I've noticed discoloration around my mouth. The best way I can describe it is a white ring around my mouth, it's not very noticeable...but it is more visible when I smile because of the skin stretching.

I was just wondering could it be due to my iron deficiency? I have been regularly taking my Iron pills how come it suddenly appeared a couple months ago?

[Billie]

To throw in also I have really dark circles under my eyes all the time, no matter how much sleep I get.