Ultrasound-guided hypertonic dextrose prolotherapy for chronic coccydynia: a comparative study of clinical outcomes and functional improvement

Introduction Coccydynia is characterized by persistent tailbone pain that significantly impairs quality of life. Despite conservative treatments, many patients experience inadequate symptom relief. Prolotherapy, a regenerative injection technique for chronic musculoskeletal pain, shows promise; however, its efficacy for coccydynia has not been evaluated in controlled comparative studies. To the best of the authors’ knowledge, this is among the first such studies.Areas covered This retrospective comparative study evaluated 56 patients with primary chronic coccydynia refractory to conservative management. Twenty-nine patients received ultrasound-guided 10% dextrose prolotherapy combined with therapeutic exercises and patient education; 27 patients received exercises and education alone. Mean pain duration was 20.7 ± 17.3 months (prolotherapy) and 26.9 ± 17.3 months (control). Primary outcomes were pain intensity and functional disability at baseline, 1-month, and 3-month follow-up. Secondary outcomes comprised the Paris Functional Coccydynia Impact Questionnaire.Expert opinion Ultrasound-guided dextrose prolotherapy combined with therapeutic exercises demonstrated superior efficacy compared to exercises alone. The prolotherapy group achieved a 73% pain reduction at 3 months versus 26% in controls. An 82.8% clinical response rate and 37.9% complete pain resolution were observed, with a favorable safety profile. These results support prolotherapy as an effective, minimally invasive option for chronic coccydynia following failed conservative management.