I had one treatment 2 months ago for stretch marks on my bum/hips and self mutilation scarring on my arms. I have noticed a significant flattening and shrinking of the scars after the first treatment! Just had my second 2 days ago. I must say it hurts a bit in the bum area and being summer here, gotta make sure to sunscreen up! I have hopes it will work well and happy to continue treatment. I just figured there was nothing I could do for scarring/stretch marks. Don't give up!