Tennis elbow (lateral epicondylitis): causes, symptoms and treatment

Anatomy and symptoms

The discomfort arises from overload of the forearm extensor tendons, particularly the extensor carpi radialis brevis. Symptoms typically include localized pain over the outer elbow, reduced grip strength and pain when lifting, twisting the forearm, or extending the wrist. Signs are most pronounced with resisted wrist extension or gripping objects, and standard clinical tests reproduce the pain.

Causes and risk factors

Repetitive motions—such as frequent racquet swinging with a racquet, frequent lifting, or sustained typing—can produce microtears and degenerative changes in the tendon. While common in sports like tennis and golf, many cases arise from occupational tasks and hobbies that use similar movements. Age, technique, sudden increases in activity, and inadequate conditioning raise risk.

Diagnosis and differential

Diagnosis is primarily clinical, based on history and physical examination; provocative maneuvers reproduce pain at the outer elbow. When needed, imaging such as ultrasound or MRI can show tendon degeneration and help exclude alternatives. Conditions to distinguish include medial epicondylitis ("golfer's elbow"), radial tunnel syndrome, elbow arthritis and referred neck pain.

Treatment

Initial management is conservative: relative rest, activity modification, ice, short courses of oral anti-inflammatory medication, and a structured physiotherapy program that emphasizes eccentric strengthening of wrist extensors. Bracing (counterforce straps) and taping may reduce symptoms during activity. For persistent pain, options include corticosteroid injections (which may give rapid but sometimes short-lived relief), platelet-rich plasma or extracorporeal shockwave therapy; surgery to debride or release degenerative tendon tissue is reserved for cases that fail prolonged conservative care. Occupational adjustments and technique coaching can help recovery.

Prevention, prognosis and notable facts

Many people improve over weeks to months with conservative measures; full recovery can take several months. Preventive strategies focus on ergonomic changes, gradual progression of activity, strengthening and proper equipment choices. A notable point: despite its name and association with sports like tennis and golf, most cases are linked to repetitive use from sports, workplace tasks or hobbies rather than a single injury. For practical guidance on exercises and workplace adjustments consult reliable resources or a healthcare professional for individualized advice (see resources).