Hello Andy,
if you don't eat anything with simple sugars in it, does it still itch?
simple sugars (white bread, white potatoes, even tomato soup tastes sweet to me)

Try it for a few days. If it improves, you might want to check if you're
prediabetic or diabetic

Other ideas:
thrush - yeast
hemmorhoids?
dryness...

and tell us what (else) you've tried.
By then, maybe others can suggest something else or Steph may have a comment
when he returns.
J

Radiation Treatment is one disease causing factor in itself that brings
up cancer and other disorders later, i did not do Radiations because of
this fear and trying alternate medicines, I think that the one way to
reduce this itchiness is to expose yourself with fresh morning air and
do some breathing exercises during then.
I also believe that radiations may cause effects that cant be corrected.

Andy?
There's some products listed here for dry itch (xerosis)
http://www.sclero.org/medical/symptoms/skin/xerosis.html
Udder Cream can be found at TSC stores
Bag balm, I'm told can be found at many veterinarians - maybe drug stores.

The solution depends on the cause and situation. (and the location).
I think a doctor might just hand you a corticosteroid cream and not examine you?

If you think it's hemorrhoid related, walkin clinic here has pamphlets with
tips.
Take warm (not hot) baths every night (or morning)
keep anal area clean - change underwear daily.
Use cleansing wipes, such as Tucks' Personal Cleansing Pads, to cleanse the
area.

If you've done all of that and you think it might be detergent related, try new
underwear.
If there's less problems, that says it might be detergent.

need some input from you, in order to get to solution for you.
Let us know, please.
J