Evidence behind this recommendation.
Selected studies from our library that inform the recommendations on this page. Evidence grade shown when available.
What Is Lateral Epicondylitis?
Lateral epicondylitis (popularly called "tennis elbow") is an insertional tendinopathy of the wrist and finger extensor muscles, especially the extensor carpi radialis brevis (ECRB), at the lateral epicondyle of the humerus. Despite the name, only 5% of cases occur in tennis players — most are in workers who perform repetitive wrist extension movements.
Histologically, this is not classic inflammation but rather angiofibroblastosis — a degeneration of collagen with disorganized vascular proliferation. For this reason, the condition is more correctly called lateral elbow tendinopathy. This understanding is crucial to grasp why NSAIDs (anti-inflammatories) work poorly in chronic cases.
Pain is typically located at the lateral epicondyle and radiates down the forearm. It worsens with handshaking, opening doors, and resisted wrist extension movements.
Tendinopathy, Not Inflammation
The substrate is collagen degeneration (angiofibroblastosis), not acute inflammation. Chronic NSAIDs are ineffective.
High Chronicity
40% of cases last more than 6 months without spontaneous resolution, generating significant impact on work capacity.
Healing Needling
Dry needling promotes a controlled microlesion that stimulates the proliferation of healthy fibroblasts and collagen reorganization.
Why Conventional Treatments Are Not Always Sufficient
Studies show that corticosteroid infiltration — the conventional "gold standard" treatment — is very effective in the short term (4–6 weeks), but presents worse results than physical therapy and dry needling after 12 months. The corticosteroid relieves quickly but can deteriorate the tendon collagen with repeated applications.
Rest alone has a low resolution rate and prolongs work absence. NSAIDs, as discussed, act little on angiofibroblastosis. Physical therapy with eccentric exercises is effective but requires weeks to months of adherence and often generates pain during the initial sessions.
THERAPEUTIC OPTIONS FOR LATERAL EPICONDYLITIS
| TREATMENT | SHORT TERM | LONG TERM (12 MONTHS) |
|---|---|---|
| Corticosteroid infiltration | Good initial relief (short-term) | Studies suggest inferior results at 12 months and higher recurrence |
| Oral NSAIDs | Moderate and transient effect | Little long-term effect (substrate is degenerative) |
| Eccentric physical therapy | Slow response (may be painful) | Good — pillar of conservative treatment |
| Dry needling | Favorable effect in 3–5 sessions | Sustained benefit comparable to physical therapy in available studies |
| Classical acupuncture | Good symptomatic relief | Moderate benefit reported |
How Medical Acupuncture Works in Lateral Epicondylitis
The main mechanism of dry needling in lateral epicondylitis is controlled microlesion at the osteotendinous junction of the extensor carpi radialis brevis. The needle penetrates the degenerated tissue, causing minimal local hemorrhage and release of growth factors (TGF-beta, PDGF) that recruit healthy fibroblasts to reorganize the disorganized collagen.
In parallel, segmental neuromodulation via Aδ fibers and the local release of substance P promote vasodilation in a naturally hypovascular region. More blood means more oxygen and more healing factors arriving at an área that chronically suffers from relative ischemia — this is one of the reasons lateral tendinopathy is só persistent without intervention.
Mechanism of Action of Needling in Epicondylitis
Needle penetrates the degenerated tissue
Precise insertion at the ECRB osteotendinous junction causes a controlled microlesion in the disorganized collagen.
Minimal local hemorrhage and platelet activation
Release of TGF-beta, PDGF, and other growth factors that signal for tissue repair.
Recruitment of fibroblasts
Healing cells invade the region and deposit well-organized type I collagen, replacing the degenerated type III collagen.
Local vasodilation via substance P
Increased blood flow in a hypovascular region, providing oxygen and nutrients for healing.
Segmental analgesia
Inhibition of the nociceptive signal in the C5–C7 segments, reducing pain and allowing gradual return to activity.
What the Scientific Studies Say
Lateral epicondylitis is one of the most studied tendinopathies regarding dry needling and acupuncture. Results are consistent: acupuncture is superior to sham for short-term pain relief, and dry needling matches physical therapy and surpasses corticosteroid infiltration at 12-month follow-up.
What Sets the Modern Approach Apart
The medical acupuncturist combines precise dry needling at the osteotendinous junction with low-frequency electroacupuncture (2 Hz) over the tendon. The low-intensity electric current amplifies the angiogenic effect and further stimulates the production of growth factors — an effect that goes beyond isolated manual needling.
The combination with progressive eccentric exercises of the extensor carpi radialis is fundamental for the durability of the result. Acupuncture creates the biological conditions for healing; the exercises provide the mechanical stimulus that orients collagen reorganization.
When to See a Physician
If you feel pain on the outer side of your elbow when squeezing objects, turning doorknobs, or carrying bags, seek medical evaluation. Pain persisting for more than 4 to 6 weeks without improvement with rest deserves investigation to rule out other causes of elbow pain.
Frequently Asked Questions
The standard protocol is 6 to 10 sessions, performed 1 to 2 times per week. Recent cases (less than 3 months) respond more quickly; chronic cases (more than 6 months) may need 10 to 12 sessions. Progressive improvement should be monitored every 3 sessions.
Not always. The physician will assess the intensity of activities and may recommend partial restrictions — such as avoiding repetitive high-impact extension movements but maintaining light activities. Total leave is not always necessary and may impair the progressive reintegration of the tendon.
It depends on the time horizon. In the short term (1–6 weeks), corticosteroid is usually faster. At 12-month follow-up, dry needling and physical therapy with eccentric exercises present superior results. For this reason, in chronic cases or with a history of corticosteroid failure, dry needling is the first option.
Yes, it is recommended. The two approaches are complementary: acupuncture reduces pain and promotes biological healing; physical therapy with eccentric exercises mechanically organizes the new collagen. Performed together or on alternate days, they mutually potentiate the results.
Angiofibroblastosis is the technical name for the histological alteration found in chronic epicondylitis: collagen degeneration with disorganized vascular proliferation, without classic inflammatory infiltrate. This information matters because it explains why NSAIDs work poorly long term and why dry needling (which stimulates fibroblasts and healthy vessels) is more appropriate.