Pain at the back of the elbow is not one diagnosis. The distal triceps tendon, olecranon bursa, posterior elbow joint, ulnar nerve and surrounding tissues can all produce overlapping symptoms. How the pain began, where exactly it sits and whether the elbow is swollen each help narrow the possibilities.
Distal triceps tendinopathy usually causes load-related pain near the tendon insertion on the olecranon, particularly during resisted elbow extension or pressing. Partial tears may produce a similar pattern and can be missed because elbow extension can remain possible. A complete rupture is a different structural injury and typically requires a different pathway altogether.
At Novo Soft Tissue in the Denver Tech Center, Dr. Scott King first determines which structure is producing the symptoms, then assesses resisted extension, tendon continuity, swelling, bruising, strength and whether ultrasound or MRI is needed before selecting progressive loading, manual soft-tissue treatment, shockwave therapy, imaging or referral. Diagnosis comes first; treatment comes second.
How the Distal Triceps Works
The triceps is the main extensor of the elbow, the muscle that straightens the arm during pushing and pressing. Its three heads join into a distal tendon that attaches to the olecranon, the bony point of the elbow. The distal triceps has a broad insertion onto the olecranon, and partial injuries may involve only part of the tendon while preserving enough continuity for active elbow extension. Reviews classify acute triceps injuries by tear location and the degree of tendon involvement, because both influence management.
Partial Tears Are Easy to Miss
Partial triceps tears are easier to miss than complete ruptures because active elbow extension can remain intact. Preserved extension therefore does not automatically exclude meaningful structural tendon injury. One review notes that incomplete tears that still allow active extension against resistance are generally managed without surgery, while tears with loss of strength are treated differently, which is why strength is tested side to side rather than simply checking whether the elbow straightens.
When the history includes a traumatic eccentric load, swelling, bruising, strength loss or pain that does not settle, imaging is considered even if the elbow still extends. The comparison is covered in triceps tendinopathy vs. partial tear.
Tendinopathy, Partial Tear or Complete Rupture?
Tendinopathy usually has a gradual onset, pain at the insertion with pressing and extension, no major bruising and preserved strength.
A partial tear may cause pain with extension and focal weakness after a traumatic or overload event, with tendon continuity partly preserved and active extension often still possible.
A complete rupture is suggested by an acute event, a pop, bruising and swelling, a possible palpable defect, marked extension weakness and structural discontinuity.
The examination does not reliably grade a tear or estimate how much of the tendon is involved. Imaging answers that question.
Complete Rupture Is a Different Injury
Complete distal triceps rupture usually follows a significant eccentric or traumatic event and often produces marked weakness, swelling or a palpable tendon defect. Reported mechanisms include a fall on an outstretched hand, a direct blow, eccentric loading of a contracting triceps and heavy weightlifting. A defect is not always palpable, and pain and swelling can limit strength testing, so a normal-looking elbow does not exclude rupture.
Complete distal-triceps rupture usually requires orthopedic evaluation because chronic retraction can make later reconstruction more complex. It is not routed through routine manual therapy or shockwave. Contemporary systematic reviews generally support surgical repair for complete distal triceps rupture in active patients, while partial tears require more individualized decision-making.
Olecranon Bursitis Is Not the Tendon
Olecranon bursitis is primarily a swelling disorder of the superficial bursa over the tip of the elbow, whereas triceps tendon pain is more strongly linked to resisted extension and tendon loading. Bursitis can be aseptic or septic. Redness, warmth, marked tenderness and fever increase concern for septic bursitis, but no single physical finding reliably separates septic from aseptic bursitis.
Seek prompt medical evaluation for swelling at the back of the elbow with fever, spreading redness, significant warmth, drainage, a recent cut or puncture over the elbow, feeling unwell, or a weakened immune system. Suspected septic bursitis is not treated with shockwave, manual therapy or routine soft-tissue care.
The differences are explained in triceps tendon vs. olecranon bursitis.
Why “My Triceps Is Tight” Is Not a Diagnosis
Tightness describes a sensation. It does not identify whether the problem is tendon, muscle, joint or nerve. A tight or sore feeling at the back of the arm can reflect tendon overload, muscle soreness, a partial tear, posterior joint pathology, ulnar nerve symptoms, protective tone or pain referred from the neck. The exam tests how each structure responds to load.
Not All Posterior Elbow Pain Is the Triceps
- Posteromedial impingement: pain that is primarily reproduced at terminal extension—especially in an overhead athlete—raises a different differential from load-related triceps tendon pain.
- Olecranon stress injury: focal bone tenderness or deep pain in a throwing athlete that does not behave like tendon pain needs bone assessment.
- Ulnar nerve: tingling into the ring and small fingers, hand weakness or symptoms with prolonged elbow bending point to the nerve, not the triceps.
- Neck: arm symptoms with neck pain, numbness or weakness may come from the cervical spine.
- Other elbow tendons: pain on the outer or inner elbow with gripping suggests tennis or golfer’s elbow, and pain at the front of the elbow with turning the palm up suggests the distal biceps or brachialis.
What We Examine
- History of onset, including any fall, blow, heavy eccentric load or pop
- Swelling, bruising and contour over the olecranon and distal triceps
- Palpation of the tendon insertion, the bursa and the olecranon bone
- Resisted elbow extension, with side-to-side comparison of pain, force and endurance
- Pain at terminal extension and elbow range of motion
- Signs of infection when the bursa is swollen
- Ulnar nerve and neck screening when symptoms suggest it
When Is Imaging Needed?
Imaging should answer a specific question: is the tendon simply overloaded, partially disrupted, or completely torn? It is considered after a traumatic onset, with bruising, a palpable defect, substantial or persistent extension weakness, a suspected partial or complete tear, symptoms that fail appropriate care, unusual swelling or uncertainty between tendon and bursa.
Ultrasound is particularly useful for dynamic and side-to-side assessment of the distal tendon, while MRI provides a broader structural view when tear extent, retraction or surgical planning is the main question.
How Treatment Is Selected
Progressive Triceps Loading
Loading is the foundation for uncomplicated tendinopathy. A typical progression moves from isometric extension to controlled isotonic extension, eccentric and concentric extension loading, cable pressdowns, push-up progressions, pressing, overhead extension where appropriate, closed-chain loading and sport or work demands. Distal-triceps rehabilitation should restore elbow-extension force and tolerance across the patient’s actual pressing demands rather than simply making the tendon less tender. Progression follows the diagnosis and symptom response, not a fixed protocol.
Manual Soft-Tissue Treatment
Manual treatment may be useful when surrounding soft-tissue restriction limits loading, but progressive extension strengthening remains essential. Manual Adhesion Release may be part of that plan when the exam supports it. Not all posterior elbow pain involves adhesion, and manual treatment does not reconnect a torn tendon.
Shockwave Therapy
Radial or focused shockwave may be considered for selected persistent distal-triceps tendinopathy after a significant tear, infection and other posterior elbow diagnoses have been considered. Direct condition-specific evidence is limited. See the shockwave evidence review.
Ultrasound or MRI
Used when tendon integrity or the bursa needs to be defined.
Medical or Orthopedic Referral
Referral is appropriate for a suspected complete rupture, a significant partial tear, marked extension weakness, a major traumatic injury, suspected septic bursitis or a progressive neurologic deficit.
You do not need to decide which treatment you need before your visit. All four tools are compared on the services page, and shockwave at Novo is explained on shockwave therapy in Denver.
What Research Says
- Uncommon and easily missed: distal triceps rupture is uncommon, and initial diagnosis may be difficult because a palpable defect is not always present and pain and swelling may limit strength testing (Yeh, 2010).
- Partial tears and extension: incomplete tears that still allow active extension against resistance are generally managed without surgery, while complete tears in active people and incomplete tears with loss of strength are repaired (Yeh, 2010).
- MRI: used to confirm the diagnosis, classify the injury and guide management (Yeh, 2010; Keener, 2015).
- Ultrasound: a 2025 review described ultrasound for tendinopathy, partial and complete tears, calcification and avulsion from the olecranon (Manske, 2025).
- Systematic review: 47 papers on distal triceps injuries found that tears are confirmed with ultrasound or MRI, partial tears can be treated conservatively, and acute complete tears are repaired (Shuttlewood, 2017).
- Bursitis look-alike: in pooled data, tenderness, redness, warmth and fever were more common in septic than aseptic olecranon bursitis, but the findings overlap (Reilly, 2016).
- Shockwave: no clinical study of shockwave for distal triceps tendinopathy was identified, so its use relies on broader tendinopathy evidence.
This is why Novo treats posterior elbow pain as a localization problem before it becomes a treatment problem.
Tendinopathy vs. partial tear → · Triceps vs. olecranon bursitis → · Shockwave evidence review →
Sources: Yeh et al., J Am Acad Orthop Surg 2010 · Keener & Sethi, Hand Clin 2015 · Shuttlewood et al., World J Orthop 2017 · Manske et al., Int J Sports Phys Ther 2025 · Reilly & Kamineni, J Shoulder Elbow Surg 2016
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