Hii..i Had A Pigmentation Around My Mouth...so My Dermatologist Suggested

Hii..i had a pigmentation around my mouth...so my dermatologist suggested to use niltan spf cream after bath...and to use Fd-lite cream at night ..my way of using was like rubbing that creams for 2 min then kept it for 3 min then wash it of...nd followed by caremoist daily cream...for almost 1 yr i had done that...after that i again got pigmentation around mouth...now my doctor said to use kojivit gel at night...nd illumax cream at day..is this ok. to use.....??