Distal Biceps Tendon Rupture
A distal biceps tendon rupture occurs when the biceps tendon tears from its attachment at the elbow.
What happens when the distal biceps tears?
The distal biceps tendon attaches the biceps muscle to the radius. The muscle helps bend the elbow and is a powerful forearm supinator, meaning it turns the palm upward. A complete rupture detaches the tendon from bone. Partial tears damage only a portion of the tendon and may cause persistent pain without a dramatic deformity. The typical injury occurs when a bent elbow is forced straight against a heavy load. The initial pain may improve quickly even though the tendon remains detached, so the loss of strength can be underestimated.
Symptoms and diagnosis
Common findings include a pop at the front of the elbow, bruising into the forearm, swelling, a gap where the tendon should be, a higher or altered biceps contour, and weakness with supination and lifting. The examination compares the injured and uninjured arms and includes specific tests of tendon continuity and supination strength. X-rays exclude fracture or another bone problem. Ultrasound or MRI can confirm a partial or complete tear when the diagnosis is uncertain.
Surgical and nonsurgical treatment
Surgical repair reattaches the tendon to its normal insertion on the radius. It is commonly considered for active patients who rely on forearm rotation strength for work, sports, weight training, or daily activity. Earlier repair is often technically easier because the tendon has had less time to retract and scar. Nonsurgical treatment may be appropriate for patients with lower functional demands, medical conditions that increase surgical risk, or a preference to avoid the rehabilitation required after repair. Patients should understand the expected loss of supination strength and endurance.
Partial and chronic tears
Partial distal biceps tears can be difficult to diagnose. Treatment depends on the amount and location of tendon involvement, weakness, activity demands, and response to therapy. Persistent high-grade partial tears may require completion and repair. Chronic complete tears may still be reconstructable, but they can require a more extensive release or graft because the tendon has shortened. This is another reason to obtain an early evaluation after a suspicious injury.
Recovery and risks
After repair, the tendon is protected while it heals to bone. Motion returns gradually, followed by strengthening. Light daily activity returns before heavy lifting, manual labor, and sports. Potential risks include infection, stiffness, sensory nerve symptoms, weakness, heterotopic bone formation, loss of forearm rotation, fracture, failure of the repair, and additional surgery. The rehabilitation plan is adjusted to the repair quality, tendon chronicity, and patient progress.
Patient Experience
“I was operated on by Dr. Knudsen for a distal biceps tear. He is patient and very knowledgeable. He truly cares about the well-being and health of his patients. I couldn't have been in better hands.”
Patient following distal biceps tendon repair | Google review
These testimonials describe individual patient experiences. Treatment recommendations, recovery, and outcomes vary by patient.
This information is educational and is not a substitute for an individualized medical evaluation. Written and medically reviewed by Michael L. Knudsen, MD | Last reviewed: July 2026
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