I think Youtube has some pictures of brains with worms. If there, why not in the scalp? Doctors are nmostly clueless about this problem.
I would try Hulda Clark 's ozonated olilve oil and coQ10 approach. It is somewhere here on CZ. If you have been reading here you may have seen my post where I have that link pasted in a link that leads to another link.
Your husband needs to be treated for worms. Ditto that doc but good luck trying to get him to listen.