Tennis elbow: ultrasound-guided electrolysis and exercise
Lateral epicondylitis, more accurately lateral epicondylalgia or tendinopathy of the elbow extensors, is the most frequent cause of lateral elbow pain in active adults. The name suggests inflammation, but what predominates is tendon degeneration. That is why rest, anti-inflammatories and corticosteroid injections bring short-term relief without resolving the problem: treatment revolves around progressive loading through exercise, to which ultrasound-guided electrolysis can be added in selected cases.
Not classic inflammation
Histologically, lateral epicondylalgia behaves mainly as a degenerative tendinopathy with collagen disorganisation and neovascularisation, not as classic inflammation. That is why rest and anti-inflammatories ease the symptom momentarily without addressing the cause, and evidence-based management revolves around progressive loading of the tendon.
Corticosteroid: worse than placebo at one year
Recurrence 4.5× higher with corticosteroid at 1 year
RCT in JAMA with 165 patients with unilateral lateral epicondylalgia comparing corticosteroid injection and placebo: 1-year recovery 83% with corticosteroid vs 96% with placebo (RR 0.86; 99% CI 0.75-0.99; p=0.01), worse with corticosteroid. 1-year recurrence 54% with corticosteroid vs 12% with placebo (RR 0.23; 99% CI 0.10-0.51; p<0.001).
The clinical lesson is direct: a corticosteroid injection brings quick relief, but at one year it leaves worse outcomes and multiplies relapses. The path that works is not the shortcut of an injection but an active, supervised programme of physiotherapy and exercise, which also speeds up recovery from the very first weeks. Repair the tendon, not just silence the symptom.
Coombes BK, Bisset L, Brooks P, Khan A, Vicenzino B. Effect of corticosteroid injection, physiotherapy, or both on clinical outcomes in patients with unilateral lateral epicondylalgia: a randomized controlled trial. JAMA. 2013;309(5):461-9. doi:10.1001/jama.2013.129
Ultrasound-guided percutaneous needle electrolysis (EPI) plus eccentric exercise
Adding ultrasound-guided electrolysis to exercise improves pain and mobility
In a controlled clinical trial, adding ultrasound-guided percutaneous electrolysis to eccentric exercise improved pain (NPRS, p<0.001), pressure pain threshold (p=0.004 at 3 months) and mobility compared with needling alone, with the benefit maintained at 1 and 3 months.
The key is the combination: the ultrasound-guided needle does not replace loading work, it enhances it. Applied under ultrasound guidance over the damaged area of the tendon and paired with progressive exercise, it is the route for cases that do not quite improve with exercise alone. An in-clinic procedure, minimally invasive and image-guided.
Rodríguez-Huguet M, Góngora-Rodríguez J, Lomas-Vega R, Martín-Valero R, Díaz-Fernández Á, Obrero-Gaitán E, et al. Percutaneous Electrolysis in the Treatment of Lateral Epicondylalgia: A Single-Blind Randomized Controlled Trial. J Clin Med. 2020;9(7):2068. doi:10.3390/jcm9072068
What the broadest review of the evidence supports
The evidence supports physiotherapy and exercise, not corticosteroid
Recent umbrella review (40 meta-analyses and 160 studies): it supports physiotherapy and PRP and autologous blood injections, not corticosteroid, while it questions acupuncture and shockwave therapy used in isolation.
The line the evidence holds is clear: progressive exercise as the foundation and ultrasound-guided techniques such as electrolysis when exercise is not enough, keeping corticosteroid out of the first line. A stepped, supervised plan, not scattered quick fixes.
Bonczar M, Ostrowski P, Plutecki D, Dziedzic M, Florek J, Michalik W, et al. Treatment Options for Tennis Elbow - An Umbrella Review. Folia Med Cracov. 2023;63(3):31-58. doi:10.24425/fmc.2023.147213
Take-home
- Lateral epicondylalgia is a degenerative tendinopathy, not classic inflammation.
- Corticosteroid worsens the 1-year prognosis compared with placebo and multiplies recurrence.
- Adding ultrasound-guided percutaneous electrolysis to exercise improves pain and mobility in cases that do not respond to exercise alone.
- A conservative approach with progressive exercise and, where appropriate, ultrasound-guided needle techniques is the current foundation of treatment.
At Avanza Salud we can help
We manage tennis elbow with a comprehensive approach: clinical and ultrasound assessment of the tendon, ultrasound-guided percutaneous electrolysis when indicated, a physiotherapy programme with progressive eccentric and isometric exercise and load modification, and complementary manual therapy. If you have had lateral elbow pain for weeks, it is worth treating it with a structured programme before considering more invasive options.