as far as i know most lightening creams tends to clog pores so please be careful.
also i found niltan slow and pretty useless for myself.
although its anyway claimed 'mild'.
as for the redness.
after the actual head/zit is completely healed..the redness will take some more time to go away.atleast wait 3 weeks to a mnth.to completely see result.
the scar/pih will take even more time.
apart from using simple non-reddening creams like clindamycin or faceclin dont irritate that place.
wash with a gentle wash.
i use saslic.and i feel its good.
also,never say never!=)
god forsakes,but in case u ever have an active zit u'll need bp(just a dot on the head/mouth of it) to heal faster/better.=)
i hope u nevr have to though.=)