freckles

Hello, I’m new to this board and it has been interesting learning about laser treatment. Next week I am going in for my first treatment. I am having my back done. I have very light skin (Irish)and dark hair. I freckle very easily when I go out into the sun. Does anybody know, if this particular skin type is good/bad? I have been through several major sunburns (significant blistering)when I was younger and am now careful about my sensitive skin. Does anybody have any knowledge about skin that freckles, because I suppose 3/4 of my back is white and the other 1/4 is brown because of the freckles on my upper back and shoulders. Any help would be greatly appreciated. Thanks