To sum up what I have discovered as far as manual trigger point therapy training and practitioners:
There are two main manual trigger therapy lines, the Myopain seminars and the John F. Barnes seminars. If you want to find a good therapist you may want to find people who are rated expert by John F. Barnes or Master according to an instructor by the Myopain seminars.
http://www.myopainseminars.com/ https://www.myofascialrelease.com/
I suggest the manual stuff and not the needle treatments. I've tried the needle treatments and I believe them to be too limited in what they can access among other problems.
John F. Barnes is the CEO of the company that does the seminars with his name and does not practice anymore. He does however have a practice he owns in Pensylvania as well as a practice that I think his son is at out west in Colorado. He also has a website you can pay to list yourself if you have undergone his seminars. It rates four different levels ending in expert. If you have big problems I suggest expert.
These are the treatments centers that John F. Barnes either owns or watches over:
http://www.myofascialrelease.com/treatment/centers/
The instructor for the myopain seminars is Stewart Wild. The structure of the company is different and the John F. Barnes is much more systemic in certification and practitioners.
Stewart Wild has a practice in Needham Massachusetts and lists himself and one other person there as capable of providing master level service. It is a large practice, but only two are rated at that level. Look at Master NMT.
http://www.360nmt.com/360nmt.php Stewart wild does not have a website to list people trained by his seminars like John F. Barnes does, nor does he have a universal rating system.
I conclude that a person should either locate a person rated expert by John F. Barnes as listed on his paid listing website, or go to a specialist treatment center run him himself in Pennsylvania, Colorado or California (his twin sons) or go to Stewart Wild or Katie Adams listed as master level in Needham Massachusetts.
In the past I have also used this website for people with the CMTPT certification, but have not been happy with any of the practitioners:
http://www.myofascialtherapy.org
There are John F. Barnes expert level practitioners in Canada and Australia and one listed as advanced in the UK.
You could of course call all of the Physical therapists and Massage therapists and ask if they have attended any seminars on myofascial manual trigger point therapy and/or of they provide that service. However you must be careful to find out how much training they have to get a hint of their understanding. I have seen many people who list they practice manual trigger point therapy, but in reality know very little. I did not ask who trained them or how much training they have or how long they have been practicing.
Indicators or poor understanding of trigger points would be things like telling you to put ice on them. This will make trigger points worse. Heat if anything would be used.