What is this? Especially on my chin - please someone help (Photo)

PLEASE READ ALL DOCTORS-had acne since 12 went on accutane twice then it came back yet again so i did minocycline for 9 months then doxy ..i am almost 22 now and recently even my scalp is getting red painful bumps.MY CONCERN IS THEY ARE LEAVING ME WITH DISFIGURED BUMPS- ARE THESE SCARS? HOW CAN I POSSIBLY SCAR WHEN IM NOT GETTINNG ACNE OR ANYTHING SOMETIMES IL LIGHTLY SCRATCH MY CHIN AND THESE BUMPS OCCUR AND THEY DONT GO AWAY! i havent had anything on my chin and this is what has happened

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