Elbow bursitis — also called olecranon bursitis — is swelling of the fluid-filled sac at the back of the elbow. It often appears as a soft lump and can sometimes be painful. So what is a swollen bursa in the elbow, and how do we treat it? 

What is the olecranon bursa?

A bursa is a fluid-filled sac that forms over bony prominences such as the elbow and knee. Normally it’s thin, and it lets the skin glide over the bone. When the bursa at the tip of the elbow is irritated by pressure or repeated movement, it thickens and fills with fluid — this is olecranon bursitis, at the very point of the elbow.

What are the symptoms of olecranon bursitis?

olecranon bursitis

The most common symptom is swelling at the tip of the elbow. Some people also have pain at the back of the elbow and stiffness or restricted movement. Direct pressure on the back of the elbow makes it worse.

In rare cases, the bursa becomes infected — a condition called septic bursitis. This is more likely after a cut to the skin lets bacteria in, and people with gout or rheumatoid arthritis are more prone to it.

When to seek urgent help. Get seen promptly if the elbow becomes hot, red, and increasingly painful, if the skin is broken over the swelling, or if you feel feverish or unwell. These can indicate septic (infected) bursitis, which needs urgent assessment and often antibiotics — it’s treated very differently from ordinary bursitis.

What causes elbow bursitis?

Elbow bursitis can follow sudden trauma — such as a fall onto the elbow — or appear for no obvious reason. Resting the elbows on hard surfaces is a common trigger, which is why it’s frequent in office workers (“student’s elbow”). An infection can develop after a cut in the skin, and gout or rheumatoid arthritis can trigger it.

How is a swollen bursa in the elbow diagnosed?

The swelling, pain, and stiffness at the back of the elbow usually make the diagnosis straightforward. But other conditions cause elbow pain and swelling — arthritis or tennis elbow, for instance — so an X-ray helps confirm the joint itself is normal. We use ultrasound or MRI when the diagnosis is unclear or to evaluate for another cause, such as triceps tendon pathology.

Sometimes a swollen bursa signals an underlying condition, such as inflammatory arthritis or gout — in which case blood tests are needed.

Elbow bursitis treatment

Most cases settle with simple treatment. Ice and compression reduce the swelling, and oral anti-inflammatories such as ibuprofen help. Most important of all is relieving the pressure — avoiding leaning on the elbow, and using an elbow pad — because ongoing pressure keeps the bursa inflamed.

Why we’re cautious about draining the bursa

Where a painful, swollen bursa doesn’t settle, the fluid can be drained with a needle under ultrasound guidance, sometimes followed by a small dose of cortisone to prevent it from refilling. But we’re wary of this.

We generally advise against draining an elbow bursa, because of the real risk of introducing infection or creating a persistent draining sinus. The skin over the olecranon is thin and heals poorly, and an infection here can spread into the elbow joint. For that reason, most cases are best managed with simple measures — ice, compression, avoiding pressure, and patience — rather than a needle. Where the swelling is persistent, an ultrasound is more useful than drainage: it can identify a coexisting triceps tendon problem, such as calcification or tendonitis.

Frequently asked questions about olecranon bursitis.

How long does olecranon bursitis take to heal?

Most cases settle with ice, compression, and oral ibuprofen. The swelling usually resolves over a few months, though it can take longer. Avoiding direct pressure on the tip of the elbow — an elbow pad helps — is one of the most important things you can do.

The bursa refilled after it was drained — is that normal?

Yes, recurrence after drainage is common — one of the reasons we’re cautious about draining in the first place. Continuing compression and regular ice packs after any drainage reduces the chance of it refilling. A snug, stretchy compression sleeve giving moderate pressure, plus ice for 10–15 minutes at least twice a day, is a good regimen.

Compression makes mine worse — what should I do?

Some people find compression uncomfortable, particularly if the bursa is very tense or tender. If it worsens the pain, ease off the compression and focus on avoiding all direct pressure on the elbow, regular ice, and anti-inflammatories. Persistent cases are worth an ultrasound to check for a co-existing triceps tendon problem.

Is olecranon bursitis the same as tennis elbow?

No. Tennis elbow affects the tendon on the outside of the elbow and typically causes pain without swelling. Olecranon bursitis is swelling of the bursa at the point of the elbow.

Can gout cause olecranon bursitis?

Yes. A high uric acid level can deposit crystals in the olecranon bursa, triggering bursitis. Other inflammatory conditions, such as rheumatoid arthritis, can do the same — which is why blood tests are sometimes needed.

Does olecranon bursitis damage the elbow joint?

No. The bursa sits outside the elbow joint, so bursitis doesn’t affect the health of the joint itself. The exception is an infected bursa, which can spread into the joint — another reason to take a hot, red, painful bursa seriously.

Final word from Sport Doctor London about elbow bursitis treatment

Elbow bursitis is common and, in most cases, settles with simple treatment — ice, compression, anti-inflammatories, and above all avoiding pressure on the elbow. We’re deliberately cautious about draining the bursa, because of the risk of infection and a persistent draining sinus. The one situation that needs prompt attention is a hot, red, painful, or broken-skin bursa, which can signal infection.

If you have persistent or painful swelling at the back of your elbow, Dr Masci can assess you in London, including an in-clinic ultrasound. Contact the team here or call +44 (0) 203 488 0350.

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