Overview
Tennis elbow (lateral epicondylitis) is an overuse injury of the forearm where the wrist extensor tendons attach to the outside of the elbow (the lateral epicondyle). It is usually caused by repeated gripping, lifting, or wrist extension that overloads the tendon, leading to irritation and degeneration that can hurt with use. Pain and tenderness often develop gradually, and the area can feel weak because the tendon is not tolerating normal stress. Most cases improve with conservative care, especially when activity is modified and the forearm is rebuilt with proper strengthening.
Symptoms
Pain is typically felt on the outer part of the elbow and may spread into the forearm, especially when you grip, lift a coffee mug, open a jar, or shake hands. The elbow may be tender to touch over the bony bump on the outside of the elbow. Symptoms often worsen with repeated wrist extension, gripping, or lifting with the palm facing down. Some people notice reduced grip strength and difficulty with everyday tasks, even though the condition is usually not associated with numbness.
Causes
Tennis elbow develops when the wrist extensor tendon is repeatedly stressed beyond what it can tolerate, causing microscopic irritation and breakdown of the tendon fibers. The problem is often not a single "acute tear," but an ongoing overload that keeps the tendon from fully recovering. Sports, work tasks, and home activities that involve gripping, turning objects, or using vibrating tools can drive this tendon overuse.
Risk Factors
Risk increases with occupations and hobbies that involve repetitive wrist extension and gripping, such as construction, painting, cooking prep, or heavy tool use. People with decreased forearm strength, poor technique, or sudden increases in activity are more likely to flare symptoms. Age-related tendon changes can also make tendons less resilient, and prior elbow pain can increase recurrence.
Prevention
You can reduce risk by improving technique and avoiding sudden increases in repetitive gripping or lifting. Using neutral wrist positions, taking frequent micro-breaks, and adjusting grip size or tool handle comfort can lower tendon load. A gradual conditioning routine that includes forearm strengthening and stretching helps the tendon tolerate normal work and sports demands. During early symptoms, modifying activities to keep pain mild and consistent often prevents the irritation from becoming chronic.
How the Diagnosis Is Evaluated
A clinician typically diagnoses tennis elbow based on your history of overuse and the location of pain on the outer elbow. The physical exam often includes checking tenderness directly over the lateral epicondyle and testing wrist extension strength and pain with resisted movements. Imaging is usually not required at first, but X-ray may be used if symptoms suggest another cause, such as arthritis or bone abnormality. Ultrasound or MRI may be considered when symptoms are atypical, persist despite treatment, or raise concern for other tendon or nerve problems.
Nonsurgical Treatment Options
Treatment focuses on reducing tendon overload and restoring strength. Relative rest and activity modification help calm irritation while you continue gentle motion and avoid painful gripping and repetitive wrist extension. A counterforce brace or wrist splint can reduce strain during daily activities, and physical therapy can guide stretching and progressive strengthening of the wrist extensors, often using pain-guided loading strategies. Short-term use of anti-inflammatory options such as topical or oral NSAIDs, along with ice or heat, may help manage discomfort while healing occurs. If symptoms persist, clinicians may consider corticosteroid injection for short-term relief, recognizing that it may not provide long-term healing for everyone. Other injection approaches such as platelet-rich plasma (PRP) or hyaluronic acid (Orthovisc) may be considered in selected cases, along with extracorporeal shockwave therapy or targeted trigger point injections when myofascial pain contributes.
When to Seek Medical Attention
Seek medical attention if pain does not improve after several weeks of well-performed conservative treatment or if it keeps worsening despite activity changes. Get prompt evaluation if you develop significant weakness, a sudden loss of function, rapidly increasing swelling, fever, or redness suggesting infection. You should also be seen promptly if pain is accompanied by numbness, tingling, or progressive neurologic symptoms, or if you cannot safely use your hand for basic tasks.
Frequently Asked Questions
Most cases improve with nonsurgical treatment such as activity modification, bracing, and progressive strengthening.
A counterforce brace or wrist support can reduce tendon strain during gripping and may help symptoms while you rebuild strength.
Often you can continue with modifications that keep pain mild and avoid repeated painful gripping or wrist extension until symptoms settle.
Next Steps
Start with activity modification to reduce painful gripping and wrist extension, and consider a counterforce brace while you begin a guided strengthening program. If symptoms are not improving after a few weeks, or if you have concerning weakness, numbness, or worsening pain, schedule a clinical evaluation for an accurate diagnosis and a tailored treatment plan.