I had this scar on my nose it's healed now it's just a black mark is there anything i can use to help it clear fast?

Why scar black?: Scars are not usually black unless a foreign body is present. This may require excision or laser treatment to eliminate the pigment.

Depends on cause: Depends on scar type, reason for scar (cause), whether the black is an embedded foreign material or accumulated skin oil-dirt (like a blackhead). See a local dermatologist to examine and advise. Must see the scar to give you a better answer.