Shoulder pain, which is the third most common cause of musculoskeletal pain, has different etiologies. Muscle, bone structures and connective tissue pathologies can cause shoulder pain. Impingement syndrome (IS), which can cover many terms such as rotator cuff disorders, tendinitis and tears, is one of the most common pathologies of shoulder pain.

The hypothesis of this study was that injection types including ACJ would increase treatment efficacy.Therefore, this study investigated the six-month follow-up results of patients undergoing SA injection and SSNB and those receiving SA and ACJ injection.

Inclusion Criteria:

• patients aged 18-65,
• who were suffering from shoulder pain for more than three months and
• who were diagnosed with IS.
• All patients included in the study were diagnosed with IS using Shoulder Magnetic Resonance imaging.

Exclusion Criteria:

• the presence of cervical radiculopathy;
• undergoing shoulder operation before;
• the presence of central nervous system or
• the presence of rheumatological disease, and polyneuropathy;
• receiving physical therapy in the shoulder area with a diagnosis of IS within the last six months; and
• receiving any injection therapy in the past.

The patients were followed up and questioned by the evaluator, who was blind to the type of injection administered to the patient.