Can the dermatologist make you almost acne free?

Ive struggled with acne since 9th grade and now im a senior who still has acne and its my last year here and i worry about my looks alot and im just sick of acne...i get it then mess with it then get marks and scabs...im thinkin of going to a dermatologist...can they get rid of my acne and marks from acne?? how are they different from just buying some leading acne stuff at

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