Tennis elbow — clinically called lateral epicondylitis or, more accurately, lateral epicondyle tendinosis — is one of the most common elbow conditions we see at LAOSS. It's the pain you feel on the bony bump on the outside of the elbow, and it has a tendency to derail simple things: typing, lifting a jug of milk, shaking a hand, even holding a coffee mug.
First, the name. Most of our tennis elbow patients have never played a set of tennis in their lives. The condition was named in the 1880s after lawn-tennis players, but today we see it just as often in office workers, plumbers, painters, carpenters, chefs, hairstylists, and new parents. Anything that involves repetitive gripping or repetitive wrist extension can light it up. The mechanism — not the activity — is what matters.
What's actually happening is a breakdown in the common extensor tendon where it attaches to the outside of the elbow. Despite the old "-itis" name, modern research shows there's very little inflammation at play. Instead, the tendon develops microscopic tears and disorganized collagen — a degenerative process called tendinosis. That distinction matters, because it changes the treatment. Pure anti-inflammatories and steroid injections can mask the pain for weeks, but they don't fix a tendon that needs to remodel. Loading the tendon correctly is what actually helps it heal.
The good news: roughly 80–90% of tennis elbow improves with conservative care within 6–12 months. The bad news: that timeline is long, and most people try to push through it without changing what's causing it. We focus on shortening that timeline.