Thanks for your query
Your problem is that of pigmentation around eyes and mouth.
Now low iron levels surely contribute to skin pigmentation and decreased skin glow.
So see a physician first and start treatment for low blood hemoglobin
Now for the skin pigmentation, start using a skin lightening cream . Something containing kojic acid
and vitamin c
is very helpful in such cases.
Use a sunscreen regularly before going out in the sun.
Take oral vitamin c supplementation along.
Take diet rich in vitamins
which includes fresh fruits and salads.
Hope it helps
Dr Geetika Paul