Keep your thumb as close to your index finger as you can when you massage or press a trigger point(TP). The movement during the massage comes mainly from your shoulder and/or your wrist, and/or the rest of your body (depending on the movement), never from your thumb, that has to be as stiff as possible. I guess all this iwas already obvious to you... You can use dry needleing for TP. It works as well ass massage, even better...Afterwards, you can massage the refered pain area with your knuckles in some muscles (Neuromuscular technic?). In long muscles, you could use only your knuckles, both in the TP and in the refered pain area.