Addressing where the nervous system and the muscle meets. When a muscle ever first contracts it is because the nervous system delivered that message to the muscle, neuro-motor junctions. These neuro-motor functions coordinate with messages from nerve sensors in the muscles that sense muscle contractions and stretches: proprioceptors. Trigger points are flared NM junctions, in pain because of disfunction in the contracting and stretching of the muscle. It may be from fibrotic tissue like "knots." Pressing into these can desensitize the pain. Deep pressure proprioception stimulation can get the muscle to release (or relax) from experienced hardness, tightness, or spasm in muscles due to local over triggered nerves. This is sometimes intense and sharp, sometimes relaxing. We prefer to refer to "intense sensations" from trigger point contact rather than calling it "pain."