You can use the search tool for past posts on upper cervical & neck strain treatment https://www.neurotalk.org/search.php

Some PTs & some DCs may use IF stim, manual trigger point release, low level laser (aka cold or soft laser), or even very skilled hands on therapy , deep tissue massage.

Really good ones are out there.. takes time & luck to find them..lots of searching , online reviews word of mouth..going into places and asking specific questions.. can help too.