Found headlice the other day. Child mention itchy a bit a couple of days after going to hairdressers but then didn't mention again had said on way to school and forgot to look at hair . Then this week said itchy and looked and found a large creepy crawly and then bug busted and found about 6 big ones and lots of black eggs. Have got rid of all and will be bug busting every day for about 2 weeks. Feel so guilty sould of checked earlier. Can the big ones do any harm had a bit of a rash on back of neck How long do you think they were there FEEL SICK