Pain and Swelling at the Back of the Elbow: Bursitis, Triceps Tendon or Joint Problem?

Short answer: Pain or swelling at the point of the elbow may come from the olecranon bursa, triceps tendon, elbow joint, a bone injury or infection. A soft lump after repeated leaning may fit non-infectious bursitis; pain and weakness when pushing or straightening the elbow may involve the triceps; and redness, warmth, fever or rapidly increasing swelling requires prompt medical assessment for possible infection. The appearance alone does not reliably identify the cause.

Some patients mainly notice a visible “ball” over the elbow, while others feel pain doing push-ups, pressing weights, pushing out of a chair or straightening the arm. Those patterns require different assessment and treatment. Repeatedly draining or treating swelling without asking why it developed may lead to recurrence.

When a swollen or painful elbow needs urgent assessment

Seek prompt or urgent medical assessment if:

• the elbow is hot, red, very tender or rapidly becoming more swollen;
• swelling occurs with fever, chills, feeling seriously unwell or an immune-system problem;
• there is a cut, puncture, bite, abrasion or draining wound near the swelling;
• pain began after a fall, collision or forceful push and the elbow is deformed;
• you cannot straighten the elbow or push normally after a sudden injury;
• there was a pop followed by bruising, a palpable gap or marked weakness;
• the hand becomes cold, pale or blue;
• numbness or weakness is sudden or progressively worsening; or
• arm discomfort occurs with chest pressure, breathlessness, sweating or collapse.

People with diabetes, immune suppression, kidney disease, inflammatory arthritis or medicines that affect immunity may require a lower threshold for medical review when swelling and infection are possible.

For a life-threatening emergency in Singapore, call SCDF 995.^[1] The Pain Relief Clinic is not an emergency service.

What is the olecranon bursa?

The olecranon is the pointed bone at the back of the elbow. A thin fluid-containing sac called the olecranon bursa helps the skin move over it. When irritated, the bursa may fill with fluid and create a visible swelling.

Olecranon bursitis may be:

• pressure-related: after repeated leaning on a desk, armrest or hard surface;
• traumatic: after a direct knock or fall;
• inflammatory: associated with gout, rheumatoid arthritis or another condition; or
• infectious: when bacteria enter through damaged skin or spread to the bursa.

Non-infectious bursitis may produce a relatively soft lump with mild discomfort. Infection is more concerning when swelling is painful, hot or red, particularly with fever or a wound. These are patterns rather than definitive rules; clinical assessment may be necessary.

Could the triceps tendon be causing the pain?

The triceps muscle straightens the elbow and attaches through its tendon to the olecranon. Tendon pain may be felt just above or at the back of the elbow during:

• push-ups, bench press or overhead pressing;
• pushing a heavy door or object;
• rising from a chair using the arms;
• throwing or forceful sporting activity; or
• straightening the elbow against resistance.

Gradual pain may fit tendinopathy or overload. A sudden forceful event followed by a pop, bruising, a gap or inability to extend the elbow may indicate a partial or complete tear and requires early assessment.

Other possible causes of pain at the back of the elbow

Elbow-joint arthritis

Arthritis may cause stiffness, swelling, reduced ability to straighten the arm, grinding and pain at the end of movement. The swelling may be deeper and more diffuse than a superficial bursal lump. Osteoarthritis, inflammatory arthritis and post-traumatic arthritis require different management.

Posterior impingement, cartilage injury or loose body

Repeated forceful straightening—particularly in throwing, gymnastics or weight training—may irritate the back of the joint. Catching, locking or a hard stop can raise a question about bone spurs, cartilage or a loose body.

Olecranon fracture

A direct fall onto the elbow or forceful triceps contraction can fracture the olecranon. Pain, bruising, inability to straighten the elbow and marked bone tenderness require assessment and usually imaging.

Gout or another crystal arthritis

Gout can affect the elbow joint or bursa and may cause sudden intense pain, redness and swelling. Infection can look similar, so a previous history of gout should not be used to dismiss fever, a wound or a possible infected bursa.

Ulnar-nerve irritation

The ulnar nerve passes near the inner-back part of the elbow. Tingling in the ring and little fingers, electric pain or hand weakness makes nerve involvement more relevant than a simple superficial bursa problem.

How is back-of-elbow pain and swelling assessed?

A clinician may consider:

• how quickly the swelling appeared and whether trauma occurred;
• pressure, work, sport, gym and medical history;
• fever, illness, wounds and infection risk;
• the location, size, warmth, redness and consistency of swelling;
• elbow bending, straightening and forearm rotation;
• triceps strength and pain during resisted extension;
• joint stiffness, catching, locking and stability;
• bone tenderness after injury;
• nerve sensation and hand strength; and
• signs of gout, inflammatory disease or another systemic condition.

Forcefully testing strength is inappropriate when a major tear or fracture is suspected. The assessment should be proportionate to the injury and warning features.

When are X-ray, ultrasound, MRI, blood tests or fluid testing considered?

X-ray

An X-ray may be considered after trauma or when fracture, arthritis, bone spur, calcification or a loose body is suspected. It does not directly establish whether a bursa is infected or show every tendon injury.

Ultrasound

Ultrasound can show fluid in the bursa, selected triceps-tendon abnormalities and superficial soft tissues. It may help guide aspiration or another procedure when clinically appropriate. The image should be interpreted alongside the examination.

MRI

MRI may be considered when a substantial triceps tear, occult bone or cartilage problem, infection extent or another deeper condition remains uncertain and the result could change treatment. It is not automatically required for every visible bursal swelling.

The American College of Radiology recommends selecting elbow imaging according to the clinical scenario. Radiographs are commonly used first when chronic elbow pain requires imaging, with ultrasound or MRI selected for the suspected soft-tissue or joint problem.^[2]

Blood and bursal-fluid tests

If infection, gout or inflammatory disease is suspected, blood tests and sometimes aspiration of bursal fluid may be considered. Fluid can be analysed for organisms, crystals and other features. The decision to aspirate depends on the clinical situation because inserting a needle also has risks.

What can be done for uncomplicated pressure-related bursitis?

When infection, fracture and major injury are not suspected, management may include:

• avoiding repeated direct pressure on the elbow;
• using padding or changing the desk and armrest setup;
• temporarily modifying provoking activity;
• using a light compression support if clinically suitable and not too tight;
• maintaining comfortable elbow movement; and
• monitoring for increasing redness, heat, pain or systemic symptoms.

Do not puncture or attempt to drain the swelling yourself. A wound can introduce infection.

Physiotherapy for triceps or mechanical elbow pain

Physiotherapy may be appropriate when the problem involves tendon capacity, movement, strength or return to function. A programme may include education, load modification, progressive triceps and upper-limb strengthening, mobility work and task-specific rehabilitation.

The starting dose differs for gradual tendon pain, a healing partial injury and postoperative care. Progress may move from comfortable low-load extension to pushing, pressing, throwing or work-specific endurance.

The Pain Relief Clinic has in-house physiotherapists who can work with the licensed medical doctor for integrated management. This can help coordinate the distinction between bursal, tendon, joint and infectious patterns; determine whether imaging or testing is appropriate; and plan rehabilitation around work or sport.

Medication and symptom relief

Topical or oral pain medicines may be considered for selected patients. Suitability depends on allergies, pregnancy, other medicines and stomach, kidney, heart, liver and bleeding risks. Antibiotics may be required for an infected bursa and should be prescribed according to medical assessment; ordinary anti-inflammatory treatment does not treat infection.

Heat, cold or other symptom-relief modalities may help selected non-infectious presentations. Avoid applying aggressive massage or unclean devices over a hot, red swelling or broken skin.

When aspiration or injection may be discussed

Aspiration may be considered to investigate suspected infection or crystals, or occasionally for a large troublesome bursa. The potential benefit must be balanced against infection, bleeding, recurrence and other risks.

Corticosteroid injection may sometimes be discussed for selected non-infectious inflammation, but it is not appropriate when infection is possible. Repeated aspiration or injection without addressing pressure, inflammatory disease or another cause can lead to recurrence.

When surgery or specialist referral may be considered

Referral may be relevant for:

• a fracture or dislocation;
• a substantial triceps-tendon rupture;
• infection requiring procedural or hospital management;
• recurrent or persistently troublesome bursitis despite appropriate care;
• mechanical locking or a symptomatic loose body;
• advanced joint disease; or
• progressive neurological dysfunction.

Referral for an opinion does not commit the patient to surgery.

What if the swelling keeps returning?

Recurrent swelling should prompt review of:

1. repeated leaning or pressure at work, during sleep or in a vehicle;
2. an unresolved wound or infection risk;
3. gout, rheumatoid arthritis or another inflammatory condition;
4. bone spurs or joint disease;
5. medicines or health conditions affecting healing or bleeding; and
6. whether previous treatment addressed the cause or only removed fluid.

How the plan changes with patient priorities

If you need to return to desk work quickly

Remove direct pressure from the elbow, adjust the armrest and alternate positions. A padded surface may help, but increasing redness, warmth or fever requires medical assessment rather than ergonomic changes alone.

If your work involves pushing or heavy lifting

Clarify whether triceps strength is intact and whether injury occurred. Temporary load reduction may be required, followed by progressive task testing. A suspected tendon rupture should not be pushed through.

If you prefer a passive treatment

A passive option should match the diagnosis. Treating a fluid-filled bursa, tendon problem and infected swelling in the same way is inappropriate. Agree on the intended outcome and review point.

If you want to avoid aspiration or injections

Pressure modification, padding, monitoring and treatment of contributing medical conditions may be appropriate for selected non-infectious cases. However, testing or drainage may be important when infection or crystals are suspected.

If you must return to sport

Visible swelling settling is not the only target. The plan may need to restore elbow extension strength, pushing capacity, range, contact tolerance and sport-specific load.

Frequently asked questions

Is a lump on the back of the elbow always bursitis?

No. Bursitis is common, but trauma, infection, gout, joint disease and other masses can produce swelling. Assessment is appropriate when the cause is uncertain.

How can I tell whether elbow bursitis is infected?

Redness, warmth, significant tenderness, fever, illness or a nearby wound increase concern, but appearance alone cannot reliably exclude infection. Seek medical assessment.

Should I drain a swollen elbow myself?

No. Puncturing the skin can introduce infection and may not address the cause.

Do I need an MRI?

Not routinely. X-ray, ultrasound, MRI and fluid or blood tests answer different questions. The choice should follow the suspected diagnosis and whether the result will change treatment.

Can physiotherapy treat elbow bursitis?

Physiotherapy may help address pressure, movement and associated strength or tendon problems, but suspected infection requires medical management. A large bursa is not simply an exercise problem.

How do I measure improvement?

Track swelling size, heat and redness, comfort when bending, ability to push or lift, work and sport tolerance, and whether symptoms recur—not pain score alone.

Key points

1. A visible swelling at the elbow point commonly involves the olecranon bursa, but the cause still matters.
2. Heat, redness, fever or rapid worsening requires prompt assessment for infection.
3. Pain and weakness during pushing may involve the triceps tendon rather than the bursa.
4. X-ray, ultrasound, MRI and fluid testing answer different clinical questions.
5. Removing fluid without addressing pressure, infection, gout or joint disease may not prevent recurrence.
6. Treatment should reflect the patient’s work, sport, previous care and preferences.

Arrange an elbow-pain and swelling assessment in Singapore

If back-of-elbow pain or swelling is persistent, recurrent, hot or red, followed an injury, causes weakness or affects work or sport, a doctor-led assessment can consider whether the pattern involves the bursa, triceps tendon, joint, bone, infection or another medical condition.

The Pain Relief Clinic
350 Orchard Road, #10-00 Shaw House
Singapore 238868
Telephone: +65 9068 9605

The clinic can assist with clinically appropriate referrals and supporting paperwork for insurance claims. Coverage, pre-authorisation, required documentation and reimbursement depend on the individual policy and insurer; assistance does not guarantee claim approval.

Not every investigation or treatment discussed is required, offered or recommended by the clinic. Availability and permissible use of medicines, devices, injections, procedures and emerging treatments in Singapore may change with evolving Ministry of Health, Health Sciences Authority and Singapore Medical Council requirements. Individual decisions require clinical assessment and should follow current Singapore regulations and professional guidance.

References

1. Singapore Civil Defence Force. Emergency Medical Services.
2. American College of Radiology. ACR Appropriateness Criteria: Chronic Elbow Pain.
3. American Academy of Orthopaedic Surgeons. Elbow (Olecranon) Bursitis.
4. Allied Health Professions Council Singapore. Registration and practising-certificate information.

Disclaimer: This information is provided for general reference only and should be used in consultation with your licensed medical doctor. It is not a diagnosis or a substitute for personalised medical advice. Seek urgent care for severe, rapidly worsening or warning-feature symptoms.

Reviewed by Dr Terence Tan — 14 September 2026