Overview
The biceps has two tendons at the shoulder but only one at the elbow, where it inserts on a bump on the radius called the radial tuberosity. Its main job there is turning the palm up rather than bending the elbow, which the brachialis mostly does. An unrepaired complete rupture leaves a permanent loss of roughly 40% of supination strength and 30% of flexion strength, and the diagnosis is often missed at first because the elbow still bends.
Treatment is decided by whether the tear is complete, by what the patient needs the arm to do, and by timing. A complete tear in an active person is repaired, and the sooner the better: within 2 to 3 weeks the tendon can be brought back to its footprint directly, whereas after 6 to 8 weeks it has scarred and shortened and a graft may be needed. Lower-demand patients can manage without surgery and accept the weakness.
Common Symptoms
- A sudden pop or tearing sensation at the front of the elbow during a heavy lift or a catch, followed by sharp pain that fades within a day or two
- Bruising in the crease of the elbow that spreads down the inner forearm over the following days
- A change in the shape of the upper arm as the muscle retracts toward the shoulder, with a hollow where the tendon used to be
- Weakness turning a doorknob, using a screwdriver, opening a jar or carrying with the palm up
Pain at the inner elbow with gripping is golfer's elbow. A Popeye bulge low in the arm after a pop at the shoulder is a rupture of the long head at the top, covered under biceps tendinitis and tear.
Causes & Risk Factors
The tendon almost always fails under an eccentric load, with the elbow bent and being forced straight against a contracting biceps: catching a falling object, a heavy deadlift or curl, hauling a sail. The typical patient is a man between 35 and 55 tearing his dominant arm, because the tendon weakens with age near its insertion while the muscle stays strong. Smoking and anabolic steroid use raise the risk.
How It Is Diagnosed
The exam is usually decisive. Dr. O'Donnell performs the hook test, hooking an index finger under the tendon from the outer side of the elbow with the arm flexed and supinated; an intact tendon can be hooked, a ruptured one cannot. The biceps squeeze test (squeezing the muscle belly should turn the forearm up) and a comparison of supination strength between arms support it.
X-rays look for a piece of bone pulled off the tuberosity and check the joint. MRI is ordered when the exam is equivocal, when a partial tear is suspected, or to measure how far a chronic tear has retracted; the arm is positioned in the FABS view so the whole tendon is seen on one image. Patients from out of town can upload their MRI through mymedicalimages.com for review before traveling.
Treatment Options
Non-operative care
A complete rupture does not reattach on its own. Non-operative care is a deliberate choice to accept the strength loss, reasonable for low demands on the arm, a non-dominant arm in an older patient, or when anesthesia carries real risk. Therapy builds the brachialis and forearm muscles to compensate for flexion; supination strength never fully returns. Partial tears involving less than about half the tendon are rested, then rehabilitated, and repaired only if pain persists for several months.
Distal biceps repair
For a complete tear in anyone who lifts, works with their hands or plays sport, Dr. O'Donnell recommends distal biceps repair, reattaching the tendon to the radial tuberosity through a small incision at the front of the elbow with a cortical button and suture anchor. Timing matters: within 2 to 3 weeks the tendon reaches the bone without tension, and beyond 6 to 8 weeks repair may require a graft. Same-week appointments are kept for this injury. The operation is outpatient at Bayside Surgery Center under a nerve block plus general anesthesia or sedation.
Recovery & What to Expect
The repair is protected early because the biceps pulls hardest with the elbow straight and the forearm turned up. A hinged brace limits extension and is opened about 10° a week, and resisted flexion and supination wait until the tendon has healed to bone. The phases below follow Dr. O'Donnell's distal biceps repair protocol.
| Phase | Timing | What happens |
|---|---|---|
| Protection | Weeks 0–2 | Hinged brace with extension limited; active-assisted flexion and unresisted forearm rotation within brace limits; no resisted flexion or supination |
| Progressive motion | Weeks 2–6 | Extension advanced about 10° per week to full by 6 weeks; active elbow and forearm motion without resistance; scar management |
| Strengthening | Weeks 6–12 | Light resisted flexion and supination from 6–8 weeks, progressed gradually; grip, forearm and endurance work; no lifting with the arm for about 3 months |
| Return to activity | Months 3–5 | Advanced strengthening and sport- or job-specific loading; heavy lifting and sport typically at 4–5 months on symmetric strength |
Desk work and typing in the brace are fine within the first week. Driving is reasonable once the brace allows enough extension to steer comfortably and you are off pain medication, usually in the second half of the brace period. The distal biceps repair protocol is available as a PDF.
Frequently Asked Questions
Can a distal biceps tear heal on its own?
A complete rupture cannot; the tendon retracts up the arm and has nothing to heal to. The elbow still bends because the brachialis does most of that work, but the loss of palm-up strength is permanent without repair. Partial tears of less than half the tendon can settle with rest and therapy.
How soon does a distal biceps tear need to be repaired?
Ideally within 2 to 3 weeks, while the tendon can still be pulled back to the bone without tension. After 6 to 8 weeks the muscle shortens and the tendon scars into the forearm, and repair may need a graft. Call (305) 393-8810; same-week appointments are kept for this injury.
What happens if I do not fix a torn distal biceps?
You keep most elbow-bending strength but lose roughly 40% of your strength turning the palm up and tire quickly with repetitive work. For a low-demand or non-dominant arm that trade can be acceptable; for anyone who lifts, uses tools or plays sport it usually is not.
When can I lift weights after distal biceps repair?
Light resisted curls and supination begin at 6 to 8 weeks. No lifting with the arm for about 3 months, then progressive loading. Heavy lifting and full sport return around 4 to 5 months once strength matches the other side. Rushing this stage is the main cause of re-rupture.
How do I know if my biceps tear is at the elbow or the shoulder?
A tear at the elbow causes bruising in the elbow crease, weakness turning the palm up, and a muscle that moves up toward the shoulder. A tear of the long head at the shoulder causes a bulge low in the arm with strength largely preserved. The hook test separates the two in seconds.
This page is for general education and is not a substitute for a medical evaluation. Treatment recommendations depend on your individual diagnosis and goals. Kevin O'Donnell, MD sees patients from Coral Gables, Miami, Brickell, Pinecrest and Coconut Grove at 475 Biltmore Way, and out-of-town patients by telemedicine.