Welcome in H.C.M.
I have gone through your query regarding itching at nose and below the eye lids just before you are going to sleep.
Here I would like to tell you that it is only your habit and have no medical facts behind it. But it is true that for a sound sleep there should not be any pain or discomfort in the body and even though some have habit of light massage
over legs or head for sleep.
So i think it is just your habit and not a medical problem.