Suggest Treatment For Spoilt Skin Due To Pimples With Dark Pigmented Nose

hi doc am venki 23 years old.......from the past few years i hav been suffering from pimples till today......these scars are making pits on my face n they r really lukin awkward and i dnt know y my nose is getting darker its like pigmentation i think....please suggest me doc really my skin is suffering a lot...please