Go get an ecography to your legs, behind the knees and see if that is your problem.
The only thing that seems to make
the morning/after shower itch go away is to take
the blood circulation pills forever. In a few weeks it will get better. If you stop taking the pills for a few days, the horrible itch comes back and then it won't go away immediately, takes a few weeks again. It's not a skin issue. It's inside.