Do the PHT poll packs help at all with TMJ issues? 

Possibly for mild discomfort. 

I have had a TMJ injected and could not believe the difference. Only had to do it every 2-3 years also. 

A good equine massage therapist can help your horse. 

My girl has been injected too and it definitely helped so much!  I'll keep doing that as needed, but I just wondered if these were worth having on a halter for extra comfort.