The shoulder is the most mobile joint in the human body and an extremely complex biomechanical system. As a whole, the shoulder contains four joints, and among the shoulder joints are the glenohumeral, sternoclavicular, acromioclavicular and scapulothoracic joints. The shoulder is an unstable joint, so shoulder injuries are common. Dynamic and static joint stabilizers are very important. Even minor trauma can cause a reduction in range of motion. In this work, the aims of the work are to describe the anatomy, biomechanics of the shoulder, and to describe the PNF method in the rehabilitation of shoulder injuries or conditions. Proprioceptive neuromuscular facilitation (PNF) as a concept of therapeutic procedures, is widespread throughout the world. The primary goal of treatment is to enable each patient to achieve their highest level of functioning. This work will describe the basics of the PNF concept. The approach to the patient and the philosophy of PNF are also mentioned. Basic facilitation procedures are very important: resistance, irradiation, body position, manual contact, voice command, vision, traction or approximation, stretching, movement pattern, timing. The goals to be achieved using PNF techniques are to increase stability, mobility, coordination, precise motor skills, endurance, and muscle strength. It is extremely important that in PNF therapy the patient actively participates in the therapy. Specific spiral and diagonal patterns form the basis of PNF. For shoulder injuries or conditions such as frozen shoulder, rotator cuff tear, or shoulder dislocation, PNF scapular patterns and upper extremity patterns can be used in therapy.