Tennis Elbow: Why a Cortisone Shot Can Cost You Later

Tennis elbow is the kind of nagging pain that makes a cortisone injection sound like an easy win. It often is, for about a month. The problem is what the evidence shows happens after that.

If someone has offered you a shot for a sore outer elbow, this is the trade-off worth understanding before you book it.

What tennis elbow actually is

Lateral epicondylalgia, the clinical name for tennis elbow, is a tendinopathy of the wrist extensor tendons where they attach on the outside of the elbow. Despite the name, most people who get it do not play tennis. It usually comes from repeated gripping and lifting, at work, in the gym, or around the house, that loads the tendon faster than it can adapt.

The pain shows up on gripping, lifting with the palm down, and pressing on the bony point at the outside of the elbow. It can be stubborn, and it tends to settle over months rather than weeks. That slow timeline is exactly why a fast fix is so tempting.

The cortisone trade-off, in the numbers

Here is the part that changes the decision. In a randomised controlled trial, corticosteroid injection for chronic lateral epicondylalgia produced worse clinical outcomes at one year compared with placebo. The injection settled pain in the short term, then the advantage reversed.

The recurrence picture is the most striking part. In that line of research, recurrence after a corticosteroid injection ran far higher than after physiotherapy or a simple wait-and-see approach, with the wait-and-see and physiotherapy groups recurring in well under one in ten cases and the injection group recurring in the large majority.

So a cortisone shot is not a cure for tennis elbow. For the typical case it buys a few comfortable weeks at the cost of a worse year and a high chance the pain comes back. That trade rarely makes sense for a condition that tends to resolve with loading anyway.

Why loading is the active ingredient

A tendon gets better when you load it progressively so it learns to tolerate more. That is the principle behind every credible tendinopathy program, and tennis elbow is no exception. The loading does the work. Everything else supports it.

In our clinic, a tennis elbow plan starts with two things at once: a graded loading program for the wrist extensor tendon, and a hard look at the daily tasks that keep re-irritating it. The grip pattern at work, the way you carry the kettle, the deadlift or rows that flare it, those inputs matter as much as the exercises. Fixing the input is often half the result.

A counterforce brace or some manual therapy can take the edge off symptoms while the loading does its job. We use them as comfort aids, not as the treatment.

Why complete rest is not the answer either

Plenty of people try the opposite of an injection and simply stop using the arm until it stops hurting. That tends to leave the tendon weak and just as sensitive the moment they go back to normal activity. The pain returns because nothing built the tolerance back up.

The middle path is the productive one. We modify the worst aggravators, keep the tendon loading at a level you can manage, and progress the load as the elbow settles. A mild ache during loading that calms by the next morning is usually fine. Symptoms that climb day to day mean the dose is too high and we back off.

What a realistic plan looks like

A tennis elbow course in our clinic usually runs over a few months, paced to the tendon rather than the calendar. Early on, we load in a range you tolerate and strip back the most provocative grip and lift tasks. As tolerance builds, the load increases and the modified tasks come back gradually. Later, the program rebuilds the specific grip and carry demands you need for work or sport.

Recovery timelines depend on how irritable the tendon is, how long it has been going on, and how consistently the loading gets done. We set expectations after the assessment, and we reassess against function, your grip strength and pain-free lifting, rather than pain alone.

When to get it assessed

Most tennis elbow is a straightforward tendinopathy, but a few patterns deserve a proper look. Pain with numbness or tingling into the hand, pain that does not follow the usual gripping pattern, or a sudden traumatic onset are worth ruling out before assuming it is a simple tendinopathy.

If your outer elbow has been nagging for weeks and a cortisone injection is on the table, get the elbow assessed first. Book a 30-minute appointment and we will confirm the diagnosis, screen the aggravating tasks, and build a loading plan, so you are not trading a good month for a worse year.

This article is general information about lateral epicondylalgia. It is not personal medical advice. A regulated practitioner can confirm whether the patterns described apply to you.

Sources

• Coombes et al. — Effect of corticosteroid injection, physiotherapy, or both on clinical outcomes in unilateral lateral epicondylalgia: a randomised controlled trial, JAMA (2013)
• College of Physical Therapists of BC (CPTBC)