What is the ruling on shaving the back of the head?

The questioner : Some people, O Shaykh, have a lot of hair on their necks, so when they shorten their hair, they shave the hair on the neck and part of the head.

The Shaykh : Yes, the apparent meaning of the narrations I have heard is that this is the practice of the Zoroastrians. Based on this, we say that if it is bothersome, there is no harm in a person lightening it, but by cutting it, and cutting is sufficient for lightening it. Yes.