trigger points is a living myth of physiotherapy...A fashioned theory once started by Travell and Simmons but now is being discarded...For more evidence search in PubMed about the work from Quintner...He had published many articles on this subject and what we like to say as "trigger point" is just a form of "SECONDARY HYPERALGESIA" caused by either peripheral or central nervous system mechanisms....Not to mention that even in ASYMPTOMATIC subjects if u use pressure on specific areas u will find out "trigger points"...SO???