The most common overuse injury in the arm. Why it develops from work and sports in Hawaii, how it gets confused with other conditions, and why PRP outperforms cortisone for long-term resolution.
Lateral epicondylitis, commonly called tennis elbow, is a degenerative condition of the common extensor tendon where it attaches to the lateral epicondyle (the bony bump on the outside of the elbow). The extensor muscles that run along the back of the forearm control wrist extension and gripping. Every time you grip a tool, twist a screwdriver, turn a doorknob, shake a hand, or swing a racket, these muscles contract and pull on their shared tendon insertion at the elbow.
When the volume of pulling exceeds the tendon's ability to repair between loading cycles, the collagen fibers begin to degenerate. Micro-tears accumulate. The tendon thickens, loses its organized structure, and becomes painful with activities that load the extensor mechanism. Like plantar fasciitis, the name "tendinitis" (inflammation) is a misnomer. Histological studies consistently show that chronic lateral epicondylitis is a degenerative process (tendinosis), not an inflammatory one. This matters because anti-inflammatory treatments address the wrong process.
Its counterpart, medial epicondylitis (golfer's elbow), affects the flexor-pronator tendon on the inside of the elbow. The mechanism is the same: degenerative overuse from repetitive gripping, wrist flexion, and forearm rotation. Both conditions are common in Hawaii's workforce and recreational population.
Despite its name, fewer than 5% of tennis elbow cases are caused by tennis. The overwhelming majority develop from occupational activities that require repetitive gripping, twisting, and wrist extension.
| Industry | High-Risk Activities | How the Extensor Tendon Gets Damaged |
|---|---|---|
| Construction | Hammering, drilling, screwdriving, operating power tools, gripping rebar, turning wrenches, painting (brush and roller), sanding | Repetitive forceful gripping combined with wrist extension and forearm rotation. Power tool vibration adds mechanical stress to already-loaded tendons. Hammering produces impact loading through the extensor mechanism with every strike. |
| Hotel & Hospitality | Wringing mops and cleaning cloths, turning mattresses, carrying stacks of dishes, vacuuming (sustained grip + push/pull), squeezing spray bottles | Sustained low-level gripping throughout an entire shift produces cumulative tendon loading that exceeds the daily repair capacity. Wringing motions combine gripping with forearm rotation, the exact loading pattern that lateral epicondylitis requires to develop. |
| Restaurant & Kitchen | Chopping (chef's knife grip), whisking, carrying heavy pans by the handle, opening jars and containers, sustained gripping of tongs and utensils | Kitchen work combines forceful gripping with rapid repetitive wrist movements. The chef's knife grip loads the common extensor origin with every cut. Sustained pan-holding with a flexed wrist loads the medial epicondyle (golfer's elbow). |
| Agriculture | Machete work, pruning, harvesting (repetitive hand-to-container motions), operating hand tools, pulling weeds, gripping hoses | Machete and pruning work produces the exact forceful gripping + wrist extension + impact loading combination that makes lateral epicondylitis a near-certainty with enough repetitions. Hawaii's year-round growing season means no recovery period. |
| Warehouse & Harbor | Operating pallet jacks (sustained grip on handle), box cutting, packaging, scanning guns (repetitive gripping and trigger pulling), dock line handling | Pallet jack operation requires sustained gripping for hours per shift. The combination of grip + push produces continuous loading on the common extensor tendon. Box cutting adds repetitive wrist extension. |
| Healthcare | Sustained gripping during patient transfers, operating manual blood pressure cuffs, typing/charting (sustained wrist extension at keyboard), carrying equipment | Patient handling requires forceful gripping under unpredictable loads. Charting at a keyboard with the wrists extended loads the extensors continuously during documentation periods. |
Hawaii's year-round outdoor climate makes tennis and pickleball twelve-month sports. There is no off-season for recovery. The backhand stroke is the primary culprit: the wrist extensors fire forcefully to stabilize the wrist at ball contact while the racket decelerates. Players who lead with the elbow on the backhand, use a grip that's too small, or play with an arm-dominant stroke rather than a body-rotation stroke develop lateral epicondylitis at rates 2-3 times higher than those with proper mechanics.
Pickleball has become the fastest-growing sport in Hawaii and across the country, and it produces lateral epicondylitis at rates comparable to tennis despite the lighter paddle and slower ball. The reason: pickleball involves more volleys per point (shorter rallies, faster exchanges), producing more impact loading cycles per hour of play than tennis.
Surfing produces medial epicondylitis (golfer's elbow) more than lateral epicondylitis. The paddling motion loads the wrist flexors and forearm pronators as the hand pulls through the water. Sustained paddling sessions accumulate thousands of loading cycles on the medial epicondyle. Outrigger paddling and canoe racing produce the same pattern.
Golf swing mechanics load both sides of the elbow: the lead arm's lateral epicondyle absorbs impact at ball contact (tennis elbow in the lead arm), while the trail arm's medial epicondyle absorbs the acceleration forces of the downswing (golfer's elbow in the trail arm). Hawaii's year-round golf season means no break from these loading patterns.
Tennis elbow is named after a sport that causes fewer than 5% of cases. Construction workers, housekeepers, chefs, and agricultural workers develop it far more frequently than tennis players. If you have outer elbow pain that worsens with gripping or lifting and you've never touched a tennis racket, it's the same condition. The treatment is the same regardless of whether it came from a backhand or a hammer.
Not all elbow pain is tennis elbow. Accurate diagnosis matters because each condition requires different treatment. Dr. Vally differentiates between these conditions through specific clinical tests, diagnostic ultrasound, and symptom pattern analysis.
| Condition | Symptom Pattern | Key Distinguishing Feature |
|---|---|---|
| Lateral epicondylitis (tennis elbow) | Outer elbow pain that worsens with gripping, lifting, wrist extension. Pain with turning doorknobs, shaking hands, lifting a coffee cup. | Pain reproduced by resisted wrist extension with the elbow straight. Tenderness directly over the lateral epicondyle. Ultrasound shows tendon thickening and disorganized collagen. |
| Medial epicondylitis (golfer's elbow) | Inner elbow pain that worsens with gripping, wrist flexion, forearm pronation. Pain with wringing, turning screwdrivers, pulling motions. | Pain reproduced by resisted wrist flexion and forearm pronation. Tenderness over the medial epicondyle. Less common than lateral epicondylitis but more common in occupational settings. |
| Cubital tunnel syndrome | Numbness and tingling in the ring and pinky fingers. Aching on the inner elbow. Worse with sustained elbow flexion (phone calls, sleeping with bent elbows). | Nerve compression condition (ulnar nerve at the elbow). Produces numbness, not the aching/burning of epicondylitis. Tapping over the funny bone reproduces symptoms (Tinel's sign). |
| Cervical radiculopathy at C6 | Elbow pain with neck pain, radiating numbness into the thumb and index finger, biceps weakness. | The pain originates in the cervical spine, not the elbow. Neck movement reproduces or changes the elbow symptoms. No tenderness over the epicondyle. Treating the elbow doesn't help because the problem is in the neck. |
| Radial tunnel syndrome | Aching in the proximal forearm (not directly on the epicondyle), worsened by supination and wrist extension. Can mimic lateral epicondylitis. | Pain is distal (farther down the forearm) compared to tennis elbow. Resisted middle finger extension reproduces pain. Compression of the posterior interosseous nerve, not tendon degeneration. |
| Elbow osteoarthritis | Stiffness and deep aching in the elbow joint, reduced range of motion, grinding or catching sensations. Pain with full extension and full flexion. | Joint-line tenderness, not epicondyle tenderness. Loss of terminal extension is the hallmark. More common in workers with decades of heavy manual labor. |
Tennis elbow produces forearm pain that can radiate toward the wrist, mimicking carpal tunnel syndrome. The critical difference: carpal tunnel produces numbness and tingling in the thumb, index, and middle fingers, worsened by wrist flexion. Tennis elbow produces aching pain in the forearm worsened by gripping and wrist extension, without finger numbness. If you're being treated for carpal tunnel and the hand numbness doesn't match the classic pattern, the problem may be at the elbow or the cervical spine, not the carpal tunnel.
Approximately 95% of tennis elbow cases resolve without surgery. The challenge is selecting the right treatment based on the stage and severity of the tendon degeneration, and understanding why certain common treatments produce short-term relief but worse long-term outcomes.
| Treatment | How It Treats Elbow Tendinopathy |
|---|---|
| PRP Therapy | The most effective non-surgical treatment for chronic lateral and medial epicondylitis. Concentrated growth factors from your own blood are injected directly into the degenerated tendon under ultrasound guidance, stimulating collagen repair at the structural level. Multiple randomized trials show PRP outperforms corticosteroid injection at 6 and 12 months for chronic tennis elbow. Results develop over 2-6 weeks as tendon repair progresses and are sustained long-term because the treatment addresses the degeneration rather than masking it. |
| Corticosteroid Injection | Provides rapid pain relief within days for acute flare-ups. Useful as a bridge treatment for severe pain that prevents work or sleep. However, research consistently shows that cortisone outcomes reverse after 3 months: patients who received cortisone are worse at 6 and 12 months compared to PRP or even watchful waiting. This reversal occurs because cortisone suppresses symptoms without repairing the tendon, and may actually impair collagen healing. Dr. Vally uses cortisone judiciously for acute situations, typically followed by PRP for long-term structural repair. |
| Trigger Point Injection | Addresses the secondary muscle tension in the forearm extensors, pronator teres, and supinator that develops around the epicondylitis. These tight muscle bands increase tension on the already-damaged tendon insertion, perpetuating the overload cycle. Releasing them reduces the mechanical pull on the epicondyle and creates a window for tendon recovery. |
| Diagnostic Ultrasound | In-office ultrasound directly visualizes the common extensor tendon, measuring thickness, identifying partial tears, and assessing the degree of collagen disorganization. This confirms the diagnosis, grades the severity, and guides injection placement precisely. Ultrasound findings also document the condition objectively for workers' compensation purposes. |
| Eccentric Loading Protocol | Specific exercises that load the extensor tendon during lengthening (eccentric contraction), which stimulates collagen remodeling. The Tyler Twist using a FlexBar is the gold-standard exercise for lateral epicondylitis, shown in clinical trials to reduce pain by 81% over 8 weeks. Dr. Vally prescribes the specific protocol and progression based on your severity and occupational demands. |
Why cortisone makes tennis elbow worse long-term: This is counterintuitive and contradicts what many patients have been told. Corticosteroid injection produces impressive short-term pain relief for tennis elbow, often within 48 hours. But at 6 months, cortisone patients have higher pain scores and lower function than patients who received PRP or even no injection at all. The mechanism: cortisone inhibits the collagen synthesis the tendon needs to repair itself. You feel better immediately, use the arm more because it doesn't hurt, and the underlying degeneration progresses unchecked. When the cortisone wears off, the tendon is weaker than before the injection. PRP takes longer to work (weeks, not days) but produces sustained improvement because it actually repairs the collagen.
Lateral and medial epicondylitis that develop from occupational gripping, twisting, and tool use are compensable cumulative injuries under Hawaii workers' compensation. Like carpal tunnel syndrome, these conditions develop over weeks to months of repetitive exposure rather than from a single incident.
Insurance carriers deny elbow injury claims by arguing the condition is caused by recreational activities (tennis, golf, pickleball) or is simply age-related degeneration. The medical record must establish that the occupational exposure is the primary or substantial contributing cause. This requires documenting the specific work activities that load the extensor or flexor mechanism, the frequency and duration of those activities, the tools and equipment used, whether ergonomic controls are in place, and the temporal relationship between the work exposure and symptom onset.
A construction worker who uses a hammer and power drill 6 hours per day and develops lateral epicondylitis has a strong occupational causation argument if the documentation connects the specific tool use to the specific tendon loading mechanism. Dr. Vally writes this level of detail because it is what determines whether the carrier approves or denies the claim.
Your right to choose your doctor: If your employer directs you to a specific clinic after developing elbow pain from work, you are not required to go there. Under Hawaii law (HRS 386-21), you choose your own treating physician. A physician who specializes in occupational medicine understands the causation documentation that cumulative injury claims require. For a full overview of your rights, see the Hawaii Workers' Compensation Complete Guide.
| Location | Address | Elbow Treatments Available |
|---|---|---|
| Kona | 81-6587 Mamalahoa Hwy, Kealakekua, HI 96750 | PRP injection, corticosteroid injection, trigger point injection, diagnostic ultrasound, IR sauna, PENS/TENS |
| Hilo | 82 Puuhonu Pl, Suite 202-203, Hilo, HI 96720 | PRP injection, corticosteroid injection, trigger point injection, diagnostic ultrasound, HBOT, PENS/TENS |
| Lihue | 2978 Haleko Rd Suite B, Lihue, HI 96766 | PRP injection, corticosteroid injection, trigger point injection, diagnostic ultrasound, HBOT, PENS/TENS |
| Kihei | 310 Ohukai Rd Suite 309, Kihei, HI 96753 | PRP injection, corticosteroid injection, trigger point injection, diagnostic ultrasound, PENS/TENS |
All locations accept Hawaii workers' compensation insurance and OWCP for federal employees. Call (808) 935-6353 to schedule an evaluation.
Vally Medical Group treats tennis elbow and golfer's elbow with opioid-free interventional medicine. PRP therapy repairs the degenerated tendon. Ultrasound-guided injection ensures precision. Four Neighbor Island locations. Workers' comp accepted.
Schedule Your Evaluation →(808) 935-6353 • Monday–Friday 8am–4pm • All locations
Carpal Tunnel Treatment (often confused with tennis elbow) • Neck Pain Treatment (C6 radiculopathy mimics elbow pain) • Rotator Cuff Treatment • PRP Therapy • Injection Therapy • Ultrasound-Guided Procedures • Sports Medicine • Construction Worker Injuries • Injury Not Getting Better? • Right to Choose Your Doctor • Workers' Compensation Guide
Disclaimer: This article is provided for informational and educational purposes only and does not constitute medical advice. Elbow conditions, treatment options, and outcomes vary between individuals. For diagnosis and treatment, consult a qualified physician. For questions about your workers' compensation rights, consult a Hawaii workers' compensation attorney.
