My son has been scratching his head for about a month now. I have searched but can’t find anything. Surely if he had had them for a month by now there would be loads and I would be able to see them very obviously? He does have a lot of thick curly hair. He had chicken pox about 3 weeks ago and I put it down to that and him having chicken pox in his hair but the spots have all healed now..could it be nits?