How To Get Rid Of Back Acne? (Pic Included) in Back/Body/Neck acne Posted February 14 · Edited February 14 by imjames · Report post Most of the red marks are old. I have my partner wash my back daily and she comments that most of the red marks are just scars. But I think you're right about cystic acne. This is doing my head in now I've had this all my life and it's frustrating. My back and shoulders are full of scars. I'd love to know why I'm prone to getting this acne. How are you getting on with your treatment? Is it working?