Tennis elbow is a painful condition caused by overuse of the forearm muscles that attach near the bony bump on the outside of your elbow. It affects 1% to 3% of adults each year, and despite the name, most people who get it have never picked up a racket. The condition develops when repetitive gripping, twisting, or lifting motions cause microscopic damage to the tendon faster than your body can repair it.
What Happens Inside the Tendon
The pain centers on a specific tendon that connects your forearm extensor muscles to the outside of your elbow. These are the muscles you use to straighten your wrist and fingers, and to rotate your forearm. When you repeat the same gripping or twisting motion thousands of times, the tendon where it anchors to bone starts to break down.
Here’s something that surprises most people: tennis elbow isn’t actually an inflammatory condition, despite being called “epicondylitis” (which literally means inflammation). When researchers examine damaged tissue under a microscope, they find disorganized collagen fibers, excessive blood vessel growth, and an abundance of repair cells, but almost no inflammatory cells. It’s a degenerative process, more like wear and tear than a sprain or infection. This distinction matters because it helps explain why anti-inflammatory treatments often provide only temporary relief.
Who Gets It and Why
The peak age for tennis elbow is 40 to 49, and women are affected slightly more often than men. At that age range, roughly 8 to 10 out of every 1,000 people develop it in a given year.
The biggest risk factor is occupational. Manufacturing workers, construction workers, healthcare workers, cleaning staff, and people in the service industry all face elevated risk. So do neurosurgeons (from the hand positions required during procedures), fruit-tree farmers, coal miners, and nursery cooks. The strongest evidence points to forearm rotation as the key culprit: rotating your forearm more than four hours a day, or holding it in a rotated position for a large chunk of your workday, significantly increases your chances. Office workers who type and mouse all day without proper support are also vulnerable.
In sports, it’s not just tennis. Any activity that involves repetitive gripping with wrist extension (holding your wrist bent back while squeezing) can trigger it. This includes racquet sports, yes, but also golf, rock climbing, and weight training with poor form.
What It Feels Like
The hallmark symptom is pain or burning on the outer side of your elbow that gets worse when you grip something, turn a doorknob, shake hands, or lift objects with your palm facing down. Early on, the pain may only show up during the activity that caused it. As the condition progresses, it can start appearing during everyday tasks like pouring coffee, opening jars, or even just carrying a bag of groceries. Some people notice weakness in their grip that makes them drop things unexpectedly.
The pain typically stays localized to the outside of the elbow but can radiate down the forearm toward the wrist. If your pain is on the inside of the elbow, that’s a different condition (golfer’s elbow). If you feel numbness, tingling, or pain radiating from your neck into your arm, the problem may originate in your cervical spine rather than the elbow itself.
How It’s Treated
The good news is that most cases resolve without surgery. Symptoms follow a predictable pattern: roughly half of patients report significant improvement every three to four months. By the end of the first year, pain and disability typically drop to 15% to 20% of where they started. The bad news is that “getting better on its own” can feel painfully slow when you’re living through it.
The first step is reducing or modifying the activity causing the damage. That doesn’t necessarily mean stopping everything. A forearm strap or counterforce brace worn just below the elbow can redistribute stress away from the damaged tendon, letting you stay active with less pain. Ice after aggravating activities helps manage discomfort in the short term.
Physical therapy is the most effective conservative treatment. The key exercises involve slowly strengthening the forearm extensors through controlled, gradual loading. Think of it as giving the tendon a structured rebuilding program. A typical exercise involves holding a light weight with your palm facing down and slowly lowering your wrist, then returning to the start position. Over weeks and months, this stimulates the tendon to lay down stronger, more organized collagen fibers. Stretching routines before work or activity also help.
Injections: Short-Term vs. Long-Term Results
Steroid injections are one of the most commonly offered treatments, and they do work quickly. At four and eight weeks, patients who receive steroid injections report better pain relief and function than those who receive platelet-rich plasma (PRP) injections. But the picture flips at six months: PRP injections produce significantly lower pain scores and better function than steroids at the 24-week mark. This makes sense given what we know about the underlying problem. Steroids suppress symptoms temporarily but don’t address the degenerative tissue breakdown. PRP, which uses concentrated growth factors from your own blood, may support actual tissue repair, though the evidence is still evolving.
In practice, steroid injections can be useful for getting through a particularly painful stretch, but repeated injections carry the risk of further weakening the tendon. They’re best understood as a bridge, not a fix.
When Surgery Becomes an Option
Up to 10% of people with tennis elbow don’t respond to conservative treatment and may be considered for surgery. The procedure involves removing the damaged portion of the tendon and, in some cases, reattaching healthy tissue. Studies show improvement after open surgery in roughly 83% to 98% of patients, with about 85% returning to full activity.
However, recent research has raised questions about whether surgery offers any advantage over simply waiting longer. In one study, patients who had been dealing with symptoms for an average of six years saw their symptoms resolve just as quickly with a placebo procedure as with actual surgery. Currently, there is no strong evidence that surgery produces better outcomes than continued nonoperative care. This doesn’t mean surgery never helps, but it does suggest that patience and consistent rehabilitation should come first.
Preventing Recurrence
If your tennis elbow was triggered by your job, ergonomic changes are essential for preventing it from coming back. For desk workers, that means proper wrist support while typing, a cushioned mouse pad, and positioning your keyboard so your wrists stay neutral rather than extended. For manual laborers, using power tools instead of hand tools when possible, rotating tasks throughout the day, and taking short breaks to stretch the forearm all reduce tendon strain.
For athletes, the most effective prevention involves checking your equipment and technique. In racquet sports, a grip that’s too small forces your forearm muscles to work harder. A racquet that’s too heavy or too stiffly strung transmits more shock to the tendon. Strengthening the forearm muscles through a consistent exercise routine builds the tendon’s capacity to handle load, making it more resilient to the repetitive stress that caused the problem in the first place.