Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain first thing that I would like to tell you is that in case if your dark complexion is since birth then it cannot be improved by topical applications of creams as skin colour is genetically determined..
But in case if it started darkening due to excess sun exposure then it can be improved, but you will have to reduce exposure to sun..
You can start washing your face with
Salicylic acid and
glycolic acid containing facewash..
You can apply creams containing
Kojic acid, glycolic acid and arbutin..
Vitamin E and C containing creams can help..
Creams that are rich in licorice extract and grapeseed extract can be helpful..
Always apply a sunscreen lotion to reduce
photosensitivity effect..
You should exfoliate your skin twice a week with a gentle face scrub..
Treatments like chemical peeling, Photofacial,
Microdermabrasion, dermal rollers etc can be helpful..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.