Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concerns.. As per your complain Acne or pimples can occur due to a number of causes like clogged pores, bacterial infection, inflammation, hormonal imbalances, oily skin etc.. Black marks left after the pimples are due to post inflammatory hyperpigmentation.. Depiwhite cream is a depigmentation creams containing Kojic acid, arbutin and other whitening ingredients and can be used for reducing the dark spots.. Along with it you can also wash your face with Salicylic acid and Glycolic acid containing facewash like AHA glow, Melaglow etc.. You can also apply Vitamin E containing gel.. Exfoliate your skin twice a week as it will unclog the pores as well as remove dead skin.. If still you have pimples you can apply ointments containing Benzoyl peroxide and Clindamycin.. Apply retinoids containing Adapelene gel at night.. You should avoid oily food and take more of green vegetables and fruits.. Drink plenty of water.. In case if you still have recurring episodes of acne you should consult a Dermatologist and a course of oral antibiotics like Minocycline and retinoids like Isotretinoin can be advised.. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.