A distal biceps tendon tear is an uncommon injury in which the biceps tendon detaches from the forearm bone at the elbow, usually after a sudden forced straightening of a bent, loaded arm. It causes significant arm weakness.
A distal biceps tendon tear is an injury in which the biceps tendon detaches from the forearm bone at the elbow. It is uncommon, usually follows a single sudden injury — the elbow being forced straight against resistance while lifting — and tends to cause significant arm weakness, mainly in twisting the forearm palm-up.
This is a time-critical injury for treatment. Assessment focuses on recognising the pattern — a pop at the elbow while lifting, followed by bruising, swelling and weakness, or a change in the shape of the upper arm — and on testing forearm supination strength. A torn tendon does not grow back to the bone on its own, so the priority is prompt clinical assessment rather than waiting on imaging.
Because surgical repair is most successful within the first 2 to 3 weeks, a suspected distal biceps tendon tear warrants early referral to an upper-limb orthopaedic surgeon. Non-surgical management — relative rest, simple analgesia and later physiotherapy — is a reasonable option for some people who are older, less active, or who injured the non-dominant arm and can accept some loss of strength. The clinic’s non-surgical treatments do not have a role in an acute complete tendon avulsion; the appropriate pathway here is timely diagnosis and surgical referral.