Lots of Doves posting on itch remedies!  Some of those sound hopeful to me, I am quite interested in the silica post.

I have had to fight itch for years because I have an illness in which itch is common.  My main "warrior" against itch is Zyrtec, an
antihistimine.  It is better for me than other antihistimines because it does not promote sleepiness, which can be dangerous if you drive or
use machinery.  I was so grateful when my pcp's  assistant found Zyrtec on the internet list for drugs which are safe and unsafe in porphyria,
another illness I inherited.  Zyrtec is safe for porphyria, but all other anti-histimines I tried were not.  the generic is just as good as the brand name for me,
and is cheaper.  

Another suggestion:  if you use body lotion or cream, buy it at the natural foods store, to minimize man-made chemical additives.  At my
supermarket's drug section, EVERY lotion has man-made chemical additives, usually several or many of them.  Useless to me.  I use primarily
Earthsciences lotion, usually buying the SPF 15 version which has an added sunscreen.  Badger Balm products are also a favorite of mine.

I have found that, in my case, diet has little effect on the itch, but I do think alkalinizing in any method is helpful.  

Years ago I tried eliminating wheat and other gluten grains, and milk, and this was not at all helpful to me.  Your body type may not respond to a
wheat free or dairy free diet.  Maybe it will respond, maybe not.  This is an area where people are definitely different.  

I do use probiotics.  Everyone should probably do so.

I do take 2000 units of Vitamin D3 daily.  I need to do this because my D tested low, and I have to avoid sunshine.  Sunshine is bad for the skin of many
people, and this may be due to genetic mutations, as sunlight is created by God, and should be good for us. Be sure to use D3 rather than D2 as it is metabolized
better.

And lastly but not leastly, continue to pray.  1Corinthians, I am praying for your relief.

Mariel Rowina