It usually happens at
that time, and only when I'm at
home. Only my legs display these symptoms. They do feel itchy
sometimes after a shower, but not as severe (almost like an after-effect of whatever bothered me at night). I am a deep sleeper, and this itch on both my legs doesn't fail to wake me up night after night, month after month. I use moisturizer hoping that it helps (it doesn't).
I recently came back from a visit to the US, and I can say I never woke up from itching while there.