Conservative management of trigger finger with steroid injections: A narrative literature review

Trigger finger (stenosing flexor tenosynovitis) is a common cause of painful digital locking and functional impairment. Corticosteroid injection is the most widely used nonoperative treatment, though its effectiveness varies depending on patient and disease characteristics. This narrative literature review synthesizes findings from 33 studies evaluating corticosteroid injection outcomes, predictors of success and failure, comparisons with other nonoperative treatments, variations in injection technique and dosage, repeat injection efficacy, and rates of surgical progression. A structured PubMed search was performed on September 1, 2025 to identify articles related to the outcomes of first and repeat injections for the treatment of trigger finger. The search yielded 92 articles, with 33 deemed relevant after title and abstract screening and backward citation searching. Reported success rates for initial injection ranged from 45 % to 80 %, with repeat injections achieving long-term relief in approximately 39 % of cases. Predictors of reduced success included multiple digit involvement, advanced disease stage, and metabolic syndrome. Notably, diabetes alone was not consistently associated with poorer outcomes. Higher corticosteroid doses (20 mg triamcinolone) improved short-term response (3 and 6 months), but long-term differences diminished with regard to this dose-dependent improvement effect (near equivalent with 5 mg, 10 mg triamcinolone at one year). While surgical release remains the most definitive treatment, corticosteroid injections provide a safe and cost-effective first-line therapy for most adults with trigger finger. Corticosteroid injection is an effective and safe first-line therapy for adult trigger finger, with many patients achieving durable relief and avoiding surgery. Predictive factors such as multiple digit involvement, advanced Quinnell stage, and metabolic syndrome help identify patients at risk for treatment failure. Compared with splinting, NSAID injection, and physiotherapy, corticosteroid injection offers superior short-term symptom improvement but carries higher recurrence rates.