Can anyone help please. I've got unbearably itchy psoriasis quite badly in my hair at the back of my head. I've built resistance to doctor's creams over the years so it's really bothering me. It might also be exema or dermatitis - I've had various diagnoses over the years. But it's never been this itchy before. I'm scatching my head in my sleep and first thing on waking and I want to do it all day. Wondering if I might have caught headlice. Do head lice like to feed on these kind of flakey skin conditions. Have checked several times recently with nit combs and lots of conditioner but found nothing but old flakes. I'd be tempted to put on a lice treatment but worried it will irritate the broken skin.