If your kid's head itches, EVEN IF THE FREAKIN' SCHOOL NURSE ASSURES YOU THAT IT'S NOT LICE, douse them anyway. Because, by the time you've tried everything in the world to make it stop itching, and finally coughed up the dough to take them to the doctor, he will assure you that it is, indeed, lice.
Just wash them with pesticides already, will you? Because permanent brain damage can't be worse than cleaning the whole house in one night. Washing everything in hot water. Vacuuming everything that doesn't move. Watching your princess cry because those stupid lice combs hurt like hell.
Then, maybe next time, my kid won't get them. Rant over.