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Most of the people will acquire more pigmentation as age increases, we call it facultative pigmentation. Lot of factors determine it, most important being sunlight, others include dust, pollution, smoking
, less hydration, intrinsic ageing and free radical damage, stress
Treatments should be to bring your pigmented skin back to your normal skin tone and make the skin tone even all over the face.
I would recommend you to use a face wash twice a day ideally a one containing glycolic acid
as it helps in exfoliation and to even out the skin tone.(eg : Melawash face wash)
The most important product will be a sunscreen. Half an hour before going out apply a sunscreen ( eg: Neutrogena Ultrasheer Dry touch sunblock) and reapply it every three to four hours. You may apply a compact powder over the sunscreen so that there is a matte finish.
At night you may apply a lightening cream containing kojic acid
( eg: Kojivit gel) over the face before going to sleep.
You may consult a dermatologist
practicing cosmetology for few sittings of chemical peels
for faster improvement.
Hope I have answered your query. If you have any further questions I will be happy to help. You may ask me a direct query by clicking on this link. http://bit.ly/dr-j-chacko
Hope this helped