This is common terminology used to explain the symptom of pain in the shoulder when there is limitation of movements although the underlying pathology can quite diverse.
Dry Needling is a procedure done to promote the healing process in an area of tendinosis or chronic tendon injury. The procedure stimulates blood flow to the area which brings with it growth factors that trigger stem cell recruitment, stimulation of fibroblasts, and induction of the healing cascade. If an actual tendon tear has been diagnosed, autologous blood injections may also be given to improve the chances of tendon healing. Dry needling does not cause any weakening of the tendon. It is usually performed in conjunction with physical therapy to improve strength and range of motion of the injured joint.