SDM is defined as the set of signs and symptoms caused by myofascial trigger points (PGM), which include referred pain, that is, experienced outside the area where the PGM is responsible for muscle weakness, mobility restriction, incoordination, fatigue muscle, delay in relaxation and recovery of muscles after their activity, as well as muscle spasm The adjective "dry" is used, not only to be faithful to the original English term (dry needling), but also to emphasize the fact that no chemical agent is used and thus unequivocally distinguish it from other invasive techniques in which some substance is infiltrated, such as local anesthetics, sterile water, isotonic saline, non-steroidal anti-inflammatory drugs, or botulinum toxin.