DS1 has these weird black dots on his scalp - mostly around the parting, but in patches all over his scalp. They do rub off if you scrape them with a fingernail - they don't shampoo out or comb out.
Until quite recently he used to have cradle cap in this area, but it seems to have gone now - I am wondering if it's connected? I don't think he has head lice, I can't see any eggs (haven't checked with comb yet but am going to check thoroughly later).
Any ideas please?