Pale skin tone on face n chest. Plshelp!

So i was a really fair kid but over time my skin tone especially on face n neck have become dark n pale. i dont know if that's bcoz of sun exposure or iron deficiency due to poor diet. I got 5 chemical peels done thinking its maybe tan. but to no use, my skin tone on face, neck n chest still looks pale n darker than my hands and legs which are actual skin tone. my s ferritin was really low 7.04 when i got it checked recently. my doc gave me iron pillsfor 3 mnths n said to get a blood test n if iron didn't increase then takeit for another 3 months. My 3 months are over taking the pills but there's no significant improvement in the skin tone on face. also my main concern is can it happen so hat only face, neck n chest skin look pale rest hands n legs look normal skin tone. Also how much time would it take for my face skin to return to its original color. it looks really odd. plshelp