Hi, you can use the following methods
- Chemical peeling, such as glycolic acid, can be used to reduce pigmentation on face
- Topical application of lime juice might prove beneficial because of natural bleach content.
- Cucumber juice applied to face aids to decrease any color marks in your face.
- Gentle exfoliating cleanser helps to remove dead skin cells and use a skin toner to close the pores
- Aloe Vera juice contains anti-inflammatory properties that help to reduce redness and skin irritation.
- Apply pure vitamin E oil to pigmentation on face
I basically use Aloe Vera cream twice a day and chemical peeling every week.
Read more here http://PigmentationOnFace.org