What is the condition?

The biceps muscle has an attachment at the elbow called the distal biceps tendon. This tendon attaches the biceps to the radius bone and is particularly important for turning the palm up (supination), as well as bending the elbow.

 

A distal biceps rupture occurs when the tendon partially or completely tears off its attachment near the elbow. This is usually a sudden injury rather than a gradual overuse problem. It most commonly occurs during a heavy lift when the elbow is forced straight while the biceps is contracting.

 

What are the symptoms?

Many patients feel a sudden pain or a 'pop' at the front of the elbow, followed by swelling and bruising. There may be a visible change in the contour of the biceps, particularly in complete tears, and a feeling of weakness.

 

The most noticeable functional problem is weakness turning the palm up, such as using a screwdriver, opening tight jars, or lifting with the palm up. Elbow bending strength may also be reduced, especially with repetitive lifting.

 

How is it diagnosed?

Examination often strongly suggests the diagnosis. Specific clinical tests can assess whether the tendon is intact. Imaging is used to confirm the tear and assess whether it is partial or complete.

 

Ultrasound can be helpful and is often readily available. Magnetic resonance imaging is particularly useful when the diagnosis is uncertain, when a partial tear is suspected, or when surgery is being planned.

 

Non-surgical treatment

Non-surgical treatment may be considered for partial tears, for patients with low functional demand, or for patients who accept some permanent weakness. Non-surgical management generally results in reduced supination strength and endurance compared with surgical repair.

 

Rehabilitation focuses on managing pain, maintaining elbow motion, and gradually strengthening surrounding muscles.

 

Surgical treatment

Surgical repair is commonly recommended for complete tears in active patients, particularly when restoring supination strength is important for work or sport. Surgery aims to reattach the tendon to the radius.

 

Timing matters. Early repair is usually technically easier. If the injury is treated late, the tendon can retract and scar, which may require more complex mobilisation or reconstruction rather than a straightforward repair.

 

Recovery and rehabilitation

Rehabilitation is staged to protect the repair. Early motion is introduced under guidance to reduce stiffness while avoiding heavy lifting. Strengthening is usually introduced at around 6 weeks, with progression to heavier activity over subsequent weeks.

 

Full recovery of strength and endurance often takes several months. Many patients notice ongoing improvement for 6 to 12 months after surgery.

 

Expected outcomes

When repaired early, most patients regain strong function and return to work and sport. Outcomes are less predictable if the tear is chronic, if there is significant tendon retraction, or if there are medical factors affecting healing.

 

Risks and complications

Risks include infection, stiffness, nerve irritation or numbness around the forearm, heterotopic bone formation, and re-rupture. The specific risk profile depends on the surgical approach and fixation method.

 

When should I seek urgent review?

Seek urgent medical review if you develop increasing redness, heat, rapidly worsening swelling, fever, increasing pain that does not settle with rest, or new weakness or numbness in the hand. If you have had a recent injury and the elbow looks deformed, feels unstable, or you cannot move it, this also requires urgent assessment.