I started using Braun Silk Expert IPL home hair removal device 3 weeks ago. Right after the first treament, I started noticing these new small brown spots that resemble the spots I get on my face when I'm exposed to sunlight. The spots in the photo are on my upper arm. I noticed that the darkest spots are those on my lightest areas(upper arm-calves). They don't look like burns; they're not peeling. Will they last forever?What should I do to prevent more of them appearing after every treatment?