I don’t know where you live but there is a new treatment available that insurance doesnt cover anyway called PIT- perineural injection therapy. You can read about it and find trained health professionals - hopefully close to you. It is specifically aimed at calming down the sensory nerves that cause the neurogenic itching.

http://Www.lyftogtmed.com

Many people get complete relief from this. I am going to a second trained professional next month. I think it is important to find one with experience and success with it. I didn’t find that to be the case with the first one. In addition, you may find one that will give you the first treatment free to see if it works. There are professionals out there who are more reasonable with their fees for this, so look around, just like you would for any high quality doc or dentist.