There are other helpful devices on the market. As my post described, I first discovered the relief while using an inversion table for traction. You can get one of those for a fraction of a new one on FB market place used. I got mine for $150 cdn. Anyway it can be a useful tool. And there are other devices. Developing the stretch effectiveness has been by far my biggest tool. I still get itching on my arms but as soon as it starts to show signs I do the stretch a few times (anywhere even driving) it goes away. Hope he finds the same success. If you get a table I can run through how to use it after you get it.
Cheers, Don