I feel your pain. My DD 26months got them from friends kids who were riddled with them.. Ive now limited contact with them... You need to get head lice treatment, treat his hair and the whole families. When you do his hair give him something to distract him.. My DD doesnt like her hair being touched but I had to do her hair, head lice are gross things.. If you cant see crawlies yet maybe you've caught it early, but his hair needs to be done ASAP. Also wash all bedding in hot water.. HTH