Has anyone ever found one louse on a head and not found any eggs, nits or lice. I found an adult louse in my hair Monday when doing my weekly check with my Robi comb. I proceeded to do 2 full comb outs each on my two children. Using a metal nit exterminator comb, licekiller brand products and hours of meticulous combing. I found nothing. No eggs, no lice. Next day my friend did the same comb out of my hair. (took 6 hours, My hair is shoulder length) and found nothing. Not one egg, not one nit, no lice at all. Any ideas on how I could have gotten just one louse on my head. (also checked hubby's hair with metal comb.) I am positive it was a louse. My son had them in January and my daughter last summer. Hence the weekly checks. I know what they look like and even checked under a good magnifier. What do you think. Could it have been a random male louse I got when hugging one of my friends?