Trigger Point Pain is a signpost for when there is disorder within the body’s tissues.
This type of pain includes a "reffered pain" to another part of the body.
Rather than blocking the sensation of pain with drugs, we can see pain as presenting an opportunity to reconfigure tissues that are not functioning so well. If the senses are dulled by strong painkillers, it will be harder to gauge the correct pressure that allows the muscle’s nerve fibres to act, allowing muscle lengthening and restoring function. That is why a massage can feel more beneficial when it focuses on those tender knots that might make you want to leap off the couch.
A trigger point can cause a high degree of discomfort.
Far more than most people believe is possible. They can also have some surprising side effects. They often produce intense referred pain which highlights the fact that the body's fascial network is an unbroken continuity; that pressure in a distal (far away) spot can have a profound effect elsewhere along that line (or meridian).
How do they occur?
Travell and Simons, the world gurus on this wrote:
Prolonged immobility is a potent source of aggravation of TrPs. Since the position of the right foot is fixed on the accelerator when one drives a car, the right hip muscles are effectively immobilized unless a special effort is made to reposition the thigh and hip….. Gluteus minimus and gluteus medius muscles are relatively immobilized during prolonged standing, as when waiting in line or when standing at a cocktail party.
So, when you're sitting at work, only ever getting up to make a coffee- this is a great way to aggravate a TrP. This can cause some spectacular low-back and leg pain, not to mention the neck and shoulder problems inherent in sedentary occupation.