A dermo had suggested dermabrasion on my leg but my parents thought that it was too risky. What do you think?

I have had what has been diagnosed as lichen striata on the back of my left thigh since i was 14. I am now 21 and I am totally frustrated. I used make up to cover it and it works well but I just want to be free again. The skin on the rest of my body is perfect. A dermo had suggested dermabrasion on my leg but my parents thought that it was too risky. What do you think? What other treatments are out there? I am so depressed about this.