Key points
- Most people with tennis elbow have never played tennis. Mouse work, tools and lifting are far more common causes.
- The tissue change is degenerative, not inflammatory, so anti-inflammatory treatment addresses the wrong thing.
- Rest reduces pain temporarily and reduces tendon capacity permanently, which is why it comes straight back.
- Progressive loading of the wrist extensors is the treatment with the best support.
- Corticosteroid injection helps in the short term and produces worse outcomes at one year than exercise.
What it actually is
The muscles that extend your wrist and fingers share a common attachment on the outside of the elbow. Repeated load through that attachment, beyond what it currently tolerates, produces a change in the tendon and a very specific tenderness at that point.
The old name, lateral epicondylitis, implies inflammation. The tissue examined under a microscope shows disorganised collagen rather than inflammatory cells, which is why the current name tends to be lateral epicondylalgia or simply tennis elbow.
That distinction is not academic. It explains why anti-inflammatories give modest, temporary relief and why loading is what changes the outcome.
Why rest is the trap
Rest works, in the sense that pain reduces. The problem is that a tendon which is not loaded becomes less capable of handling load. After six weeks off, the tendon tolerates less than it did at the start, so returning to the same activity reproduces the same pain, often faster.
This is the single most common reason people cycle through months of tennis elbow: rest, feel better, return, hurt again, rest longer.
What works
Progressive loading of the wrist extensors, starting at a level the tendon tolerates and building over weeks. Some discomfort during the exercise is acceptable and expected; what matters is that it settles within twenty four hours and does not build session to session.
Alongside that: reducing the specific aggravating load temporarily rather than stopping everything, checking grip and technique where relevant, and treating the neck and shoulder if the assessment implicates them, which it sometimes does.
Manual therapy, dry needling and instrument assisted work can reduce symptoms enough to make the loading possible sooner. None of them replace the loading.
Timeframes
Three to six months is normal. Tendons adapt slowly, and the people who recover fastest are usually the ones who accepted that timeline early instead of restarting the programme every time they had a bad week.