I've been playing around with these Chinese suction cups for about a month now, and they seem to work pretty well on trigger points.

Saturday afternoon, I had these knots in the back of my arm, and shoulder, that were driving me crazy. Kind of in the rotator cuff area. I used the Theracane on them and that helped a little bit. Then I got the idea to use a Chinese cup on them.

I had my wife put the cup on because I couldn't reach back there. I told her to just feel around for a tight spot and put the cup on it. She did, and after about 5 minutes the trigger point relaxed. It felt so much better, that I had her keep moving the cup around, until we covered seven or eight different spots. Anywhere there was a knot.

I'm not sure if these will work consistently for that, but so far I'm liking them a lot. All the muscles I've used them on seem be getting softer and more pliable.