What is olecranon bursitis?

Olecranon bursitis is swelling of the bursa, a thin fluid-filled sac, over the bony tip of the elbow. When the bursa is irritated it fills with fluid and produces a soft, sometimes large swelling at the back of the elbow, nicknamed 'Popeye elbow.' It is most often caused by pressure or leaning on the elbow, but it can also follow a knock, gout, inflammatory arthritis, or infection.

How do I know if it is infected?

An infected olecranon bursa is red, warm, markedly tender, and may come with a fever, and there is often a recent cut or scrape over the elbow. A non-infected bursa, by contrast, is usually a comfortable swelling with normal skin color and temperature. Telling the two apart is the most important step, because an infected bursa needs prompt aspiration for culture, antibiotics, and sometimes drainage, while a non-infected one usually settles with simple measures.

Do I need it drained?

Not always. Most non-infected cases settle with activity modification, padding or compression, and avoiding leaning on the elbow. Aspiration is used when the swelling is large or uncomfortable, or when infection or gout is suspected and the fluid needs to be tested. If the underlying pressure continues, an aspirated bursa can refill, so removing the source of irritation matters for a lasting result.

Olecranon Bursitis, Steven J. Lee, MD

Q: Will I need surgery?

Usually not. Surgical excision of the bursa is reserved for chronic or refractory cases that do not respond to non-surgical measures, or for recurrent infections. It is an outpatient procedure, and after it the skin over the bony tip of the elbow is protected while it heals because that skin has little cushioning beneath it.

The olecranon bursa is a thin, normally flat sac of tissue that sits between the skin and the bony tip of the elbow, letting the skin glide smoothly over the bone. When it becomes irritated or inflamed, it fills with fluid and produces a soft, sometimes dramatic swelling at the back of the elbow, which is why the condition is nicknamed 'Popeye elbow.'

Most olecranon bursitis is not infected and settles with simple measures aimed at removing the source of irritation. The single most important question, though, is whether the bursa is infected. An infected bursa is red, warm, very tender, and may be accompanied by fever, and it needs prompt drainage or antibiotics. Distinguishing the two is the foundation of treatment.

Symptoms

Common findings include:

A soft, fluid-filled swelling over the point of the elbow, sometimes quite large
Discomfort with leaning on the elbow or with full bending
Skin that is comfortable and normal in color in a non-infected bursa
Redness, warmth, marked tenderness, and sometimes fever, which point to an infected bursa needing prompt care

Causes

The most common cause is repeated pressure or leaning on the elbow, which is why olecranon bursitis is sometimes called 'student's elbow' or 'miner's elbow.' A single direct blow to the elbow can also trigger it.

Other causes include gout, which can deposit crystals in the bursa, inflammatory arthritis, and infection. Infection can follow a small cut or scrape over the elbow that lets bacteria into the bursa, and it is the cause that must never be missed.

How it is diagnosed

The diagnosis is usually clinical, based on the appearance and feel of the swelling. The examination focuses on separating an infected from a non-infected bursa using the signs of redness, warmth, tenderness, and fever.

When infection or gout is suspected, the fluid is aspirated with a needle and sent for analysis and culture. X-rays are obtained when a bone spur or a foreign body is suspected as the underlying driver.

Dr. Lee's approach

Dr. Lee's first job with olecranon bursitis is to determine whether it is infected, because that single distinction changes everything. A red, warm, tender bursa, particularly with a fever or a break in the skin, is treated promptly with aspiration for culture and antibiotics, and with drainage if it does not settle.

For the far more common non-infected bursitis, his approach is conservative: activity modification, padding and compression, and most importantly avoiding leaning on the elbow, which removes the source of irritation. Aspiration is used when the swelling is large or uncomfortable. Surgical excision of the bursa is reserved for chronic or refractory cases that do not respond to these measures.

Non-infected bursitis

Most cases settle with activity modification, padding or a compression sleeve, and a deliberate effort to stop leaning on the elbow, which is usually the source of the problem. Aspiration of the fluid is added when the swelling is large or uncomfortable, with the understanding that it can refill if the underlying pressure continues.

Infected bursitis

An infected bursa, recognized by redness, warmth, marked tenderness, and sometimes fever, needs prompt treatment. The fluid is aspirated and cultured, antibiotics are started, and surgical drainage is used if the infection does not settle. This is the situation that must not be mistaken for a simple swelling.

Surgical excision

Surgical removal of the bursa is reserved for chronic or refractory cases that do not respond to non-surgical measures, or for recurrent infections. It is an outpatient procedure, and care is taken to let the skin over the bony tip of the elbow heal well, because that skin has little padding beneath it.

Recovery timeline

Recovery depends on the cause and the treatment:

Non-infected, early
Activity modification, padding, and avoiding leaning on the elbow. Swelling subsides over days to a few weeks.
After aspiration
A compression dressing reduces refilling. The underlying pressure must be removed to prevent recurrence.
Infected bursa
Antibiotics and close follow-up, with drainage if needed. Resolution depends on clearing the infection.
After excision
Wound protection while the elbow-tip skin heals, then a gradual return to activity over several weeks.

What patients commonly misunderstand

Two things worth understanding about olecranon bursitis.

'A big swelling on my elbow must be serious.' The size of the swelling does not tell you how serious it is. Most olecranon bursitis is not infected and settles with simple measures, even when the swelling looks dramatic. What matters far more than size is whether the bursa is infected, shown by redness, warmth, marked tenderness, and fever.
'Just drain it and it will be gone.' Aspiration can shrink the swelling, but if the underlying pressure (usually leaning on the elbow) continues, the bursa often refills. Lasting resolution comes from removing the source of irritation. Aspiration also should not be done casually on a possibly infected bursa without the right precautions.

This page is general educational content authored by Dr. Lee. It is not a substitute for individual medical advice. Every patient's case is different, book a consultation to discuss yours.

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Olecranon Bursitis: the swollen tip of the elbow.