I came accross your mentioned treatment using hystamines, and would suggest your solution to my wife, who also has sever itching problems... since 1995. It is nearly constant, with some periods of time where the itching is less. She has tried all types of creams (including cortisone), diet changes, etc. but it just won't go away.
Additionally, she has raised, chappy, partly-broken reddish skin patches (about an inch wide on the outer skin on each side of the rectum area), which seems to be eczema.
Before I suggest this to her I would like to know ...
1) did your itching symptoms stay away? are you cured?
2) did you also have an eczema?
3) also, did anybody else try the approach with success?