I've suddenly noticed them in 2 little gatherings on his shoulders, about 6-7 tiny coffee coloured patches. I've never noticed them before, DS is 6 and so far very healthy.
I googled and now I'm worried about neurofibromas. 
Should I be concerned about this, is it something to get checked out anyway?
DS has very blonder hair and however much sun cream and hats I lit on him he goes very brown in the summer, so atm he is very tanned on his arms/legs/face but still pale on his shoulders where the patches are, I've not looked for anymore I don't want to alarm him.