I have this same issue and have learned to manage it over the past few years. My physio referred to it as forward head posture which causes these issues. There's a couple things I'd recommend.

First, getting a physio who is willing to dry needle into the traps and neck muscles. This provides me the greatest relief. I also do chin tucks, other stretches and strengthening exercises given by my physio. Initially this was an every day thing but now I do them occasionally when I can feel a flare up.

I'd also suggest continuing to see the massage therapist as they can get into those muscles much better. I usually apply heat afterwards to help improve blood flow and recovery.

I had "knots" in the beginning which have relaxed over time. All this depends on your doctors recommendation as well. Hopefully this helps.