Objectives:To determine whether shoulder pain is common and whether it affects individuals with uncontrolled diabetes mellitus' ability to do daily activities (DM). Methods: All patients with uncontrolled DM (HbA1c > 9) who visited the diabetes clinic throughout the study period were included in this cross-sectional study, which was carried out over a period of four months from October 2021 to January 2022. A doctor from the Family Medicine Department conducted telephone interviews using the American Shoulder and Elbow Surgeons Assessment Form, a previously validated questionnaire. Results: The study involved 285 patients in all; 156 (54.7%) of them were women, and 129 (45.3%) were men. Most of the patients (51.1%) were in the 45-64 age range. 41.1% of the patients had type I DM, while 58.9% of the patients had type II DM. 10.56 was the mean HbA1c value. 42.5% of the patients (109; 38.2%) who reported shoulder pain were between the ages of 45 and 64, and 44.1% were between the ages of 65 and 96. In contrast to the 176 (61.8%) participants who reported no pain at all, 70% of men and 54% of women had no shoulder pain (p 0.001). According to various age groups, the average shoulder pain intensity for all patients was 5.81 (SD=3.21), ranging from 4.71 (SD=3.15) to 6.13 (SD=3.29) and showed a significant correlation (p<0.05). Conclusions: Physicians are becoming more concerned about early identification and treatment of shoulder dysfunction due to its rising prevalence. In order to enhance the patients' daily lives, it should be obligatory for diabetes care programmes to include screening, preventive, and rehabilitation measures for shoulder dysfunction.