How to cure de quervains tendonitis

The short version: corticosteroid injections work for most people in the short term, but the evidence is thin on long-term safety and the underlying cause is almost never addressed.

De Quervain’s tenosynovitis is an inflammation of the tendon sheath on the thumb side of your wrist. The evidence here is dominated by small, short-term studies of corticosteroid injections. A 2009 trial found that 78% of people who got an injection reported improvement, compared to 25% who got a placebo [3]. The number needed to treat was just 2, meaning one in every two people treated gets meaningful relief [3]. A 1991 study reported about 90% of patients had significant symptom relief after a single injection [4]. A 2018 trial found that adding a thumb spica splint to the injection did not improve outcomes [1], though a 2014 study did find a benefit from adding a cast [2]. The evidence is mixed on immobilization.

But here is what the evidence does not tell you. The longest follow-up in these studies is about a year [3, 4], and the recurrence rate in the 1991 study was 30% at an average of 11.9 months [4]. No study here compares injection to simply resting the wrist, changing how you use your hand, or addressing the repetitive strain that caused the problem in the first place. The 2013 meta-analysis found that repetitive, forceful manual work is strongly associated with this condition (odds ratio 2.89) [7], yet none of the treatment studies tested whether changing that work pattern alone resolves it.

The risks of the injection itself are real. A 2021 case report documented skin hypopigmentation and subcutaneous fat atrophy after a single triamcinolone injection for de Quervain's [5]. That is a cosmetic injury that took a year and a half to resolve. The injection also suppresses local immune function temporarily, and repeated injections can weaken the tendon. The 2014 acupuncture trial found that both acupuncture and injection improved symptoms, with injection slightly better on pain scores (1.2 vs 2.0 on a 10-point scale) [6], which suggests that mechanical and anti-inflammatory effects overlap.

My call: a single corticosteroid injection is likely to give you short-term relief, but the evidence does not support it as a cure. The recurrence rate is substantial, the cosmetic side effects are real, and the underlying mechanical cause is never addressed in these studies. If you try it, do one injection, not a series, and use the relief window to change the repetitive hand motions that caused the problem. Surgery is an option for refractory cases, but the evidence here does not compare it to conservative care. Confidence: moderate for short-term benefit, low for long-term resolution.