Hi Doctor I Am Biba From India.i Have Been Suffering

hi doctor i am biba from india.i have been suffering from pigmentation since 3 years.doctor i used skin lite for 2 months i have seen improvement with in two weeks.but after two months day by day my skin getting black and reddish colour.already i have used kojic acid and azeliac acid but no improvement.sir please tell me what i have to do to get rid of this pigmentation.