Hi doctor. I am a dark skinned guy. 24yrs.My face, hands, neck are very much darker than my body. I have pimple spots all over my face.forehead most. I used to have acnes pimples.nowadays though the frequency is less but still i get those nd they leave marks.suggest me to remove the spots quickly within a stipulated span.nd also to lighten my face colour as i want a clear look.help.