Background: A degenerative condition called adhesive capsulitis, also known as "frozen shoulder", causes excruciating discomfort when moving and restricts the range of motion (ROM). The purpose of this study is to determine whether diaphragmatic breathing exercises have any immediate impact on pain and joint mobility in individuals with adhesive capsulitis. Patients and procedures A total of 24 patients who reported adhesive capsulitis were included and divided into two equal groups: group A (control) and group B (experimental). Group B underwent one session of 20 minutes of diaphragmatic breathing exercises while group A received no treatment at all and simply rested on a chair for the duration of group A's treatment. A visual analog scale was used to quantify shoulder pain, and a universal goniometer was used to measure the shoulder range of motion. Results: There was a significant difference (p