Trigger Point Dry Needling (TDN) is a valuable treatment used to influence neuro-musculoskeletal related pain and muscle function related to myofascial trigger points or tender points within a taut band of muscle.  Trigger point dry needling is an invasive procedure in which a very small diameter, solid, filiform needle is inserted directly into a myofascial trigger point.  A trigger point consists of multiple contraction knots, which are related to the production and perpetuation of the pain cycle.  It is called dry needling because it does not involve injection a wet substance.