Biceps Tendon Tears and Ruptures
at the Elbow

The distal biceps tendon connects the biceps muscle of the upper arm to the radius bone in the forearm at the elbow. This tendon plays a critical role in forearm rotation (supination) and elbow flexion (bending). A distal biceps tendon tear occurs when this tendon partially or completely detaches from the bone, most commonly as a result of a sudden forceful load applied against a bent elbow.

What Causes Distal Biceps Tendon Tears?

The most common mechanism of injury is a sudden, unexpected eccentric force applied to a flexed (bent) elbow — for example, catching a heavy falling object or attempting to lift something much heavier than anticipated. The tendon may partially tear or completely rupture from its attachment point at the radial tuberosity.

Risk factors include:

• Age: Most distal biceps tears occur in men between the ages of 30 and 60.
• Smoking: Tobacco use is associated with tendon degeneration and significantly increases the risk of rupture.
• Corticosteroid use: Chronic use of corticosteroids can weaken tendons and predispose them to tearing.
• Heavy lifting: Occupations or activities involving repetitive heavy lifting increase the risk of tendon overload.
• Tendon degeneration: Over time, wear and tear can weaken the tendon, making it more susceptible to tearing even with moderate force.

Symptoms

A distal biceps tendon tear often presents with distinctive symptoms:

• Sudden, sharp pain: A “pop” or tearing sensation is often felt at the front of the elbow at the time of injury.
• Swelling and bruising: Significant swelling and discoloration (ecchymosis) typically develop in the front of the elbow and may extend down the forearm within the first few days.
• Weakness: Noticeable weakness in bending the elbow and particularly in rotating the forearm (turning the palm upward, as when using a screwdriver). Supination strength may be reduced by up to 40% with a complete rupture.
• Visible deformity: With a complete tear, the biceps muscle may retract up the arm, creating a noticeable bulge in the upper arm — sometimes called a “Popeye deformity.”
• A gap in the front of the elbow: The area where the tendon normally sits may feel empty or hollow when palpated.

Diagnosis

Dr. Hessing will perform a thorough physical examination, including specific tests to evaluate the integrity of the distal biceps tendon:

• Hook test: The examiner attempts to “hook” a finger under the intact tendon at the front of the elbow. If the tendon cannot be hooked, a complete tear is likely.
• Biceps squeeze test: Squeezing the biceps muscle belly to see if the forearm supinates. Absence of forearm rotation suggests a tear.
• MRI: Magnetic resonance imaging is the most reliable method for confirming a distal biceps tendon tear and determining whether the tear is partial or complete, as well as the degree of tendon retraction.
• X-rays: While X-rays do not show soft tissue tears, they may be obtained to rule out associated fractures or bone abnormalities.

Treatment Options

Non-Surgical Treatment

Non-surgical treatment may be considered for patients who are elderly, have low physical demands, or have significant medical conditions that make surgery risky. Non-surgical management includes:

• Rest and activity modification: Avoiding heavy lifting and forceful forearm rotation.
• Ice and anti-inflammatory medications: To manage pain and swelling in the acute phase.
• Physical therapy: To maintain range of motion and strengthen the surrounding muscles to compensate for the lost tendon function.

Important: Non-surgical treatment of a complete distal biceps tendon rupture will result in permanent loss of approximately 30–40% of forearm supination strength and 10–20% of elbow flexion strength. For active patients, surgical repair is strongly recommended.

Surgical Treatment

Surgical repair is the standard of care for complete distal biceps tendon ruptures in active patients. The goal of surgery is to reattach the torn tendon to the radial tuberosity.

• Timing: Early surgical repair — ideally within 2–3 weeks of injury — produces the best outcomes. Delayed repairs beyond 4–6 weeks become progressively more difficult as the tendon retracts and scar tissue forms.
• Surgical technique: The tendon is reattached to the bone using suture anchors, interference screws, or a cortical button fixation technique through one or two small incisions at the front of the elbow.
• Partial tears: Partial tears that do not respond to conservative treatment may require surgical debridement (removal of damaged tissue) and repair.

Recovery After Surgery

• Weeks 1–2: The arm is immobilized in a splint or brace. Gentle finger, wrist, and shoulder motion are encouraged.
• Weeks 2–6: A hinged elbow brace allows gradually increasing range of motion. Light daily activities may be resumed with restrictions on lifting.
• Weeks 6–12: Progressive strengthening exercises begin under the guidance of a physical therapist. The brace is typically discontinued.
• 3–6 months: Gradual return to full activities, including sports and heavy lifting, as strength returns. Full recovery of strength typically requires 4–6 months.

When to See a Specialist

You should seek prompt evaluation from an elbow specialist if you experience:

• A sudden pop or tearing sensation at the front of the elbow during lifting
• Significant swelling and bruising at the elbow and forearm
• Weakness when bending the elbow or turning the forearm
• A visible change in the shape of the biceps muscle
• Persistent pain at the front of the elbow that does not improve with rest

Time-sensitive: If a complete distal biceps tendon rupture is suspected, early evaluation is critical as surgical repair is most successful when performed within the first 2–3 weeks after injury. Schedule an appointment with Dr. Hessing as soon as possible. Related conditions include tennis elbow, golfer’s elbow, cubital tunnel syndrome, and elbow arthritis.