What to do if i'm suffering frm becker's naevus and have a lot of body hair.so is this the reason?

Let's talk about it: Both are genetic -- it's you. I have several physician colleagues with Beckers' nevi and every one of them likes them. You can get lasered if you want, with so-so results, or you can embrace this special patch of testosterone-sensitive skin. It's essentially no danger, and you'll find folks who like you like the mark as well. If you prefer smooth, shaving, waxing, lasers / electrolysis are options