Niksik, for the such spots.. Neutrogena has a product called "on-the-spot" which combats the pimple since it contains salicylic acid.
njgal, if the spots are on u're upper cheek area u may use equal portions of lemon juice and sugar-cane juice.. even tomato jice works however, this takes time to see results
Microderm is an option where u're therapist will exfoliate the outer layer and this is usually done every 10 days and it is also alternated with glycolic peels for maximum results. Microderm is milder compared to peels.
Maham, skin discoloration around the mouth area is very normal.. if it's really dark u shud show it to u're derm who may prescribe HQ gel that is actually a skin bleaching cream. If it's a mild case apply the red sandawood, wild turmeric and lemon juice remedy for sometime.
Also massage the area with Vitamin E oil, to distribute to melanin that's causing the pigmentation.