As noted above definitely as a beginner it is usually to much pressure, angle of approach, not stretching the skin and the fact that our necks are tender and just more prone to irritation at first I think.
So lighten the touch, flatten your angles out a bit more with plenty of lather you will come around I copped the neck irritation many times in the first month or so learning this with the against the grain.
It is a lot of minor hand manipulation to learn at first just take your time you will appreciate it all in the end