Tendon rupture

Biceps tendon rupture

The biceps tendon can tear at the top, where it attaches at the shoulder, or at the bottom, where it attaches at the elbow. A tear at the shoulder is the more common and is usually managed without surgery. A tear at the elbow is less common but is often repaired with surgery to protect the strength used to twist the forearm.

📊 Most biceps tears (around 9 in 10) happen at the shoulder end. Tears at the elbow end are much less common and occur mainly in men doing heavy lifting.

Common age groupShoulder end: 40-70 years; elbow end: 30-60 years
TreatmentWithout surgery (shoulder end) or surgical repair (elbow end)
Recovery3-12 months
Biceps tendon rupture
What is it?
Symptoms
Diagnosis
Treatment
Recovery
Surgery prep

What is a biceps tendon rupture?

The biceps is the muscle at the front of the upper arm. It is anchored by two tendons at the top, where it attaches around the shoulder, and by a single tendon at the bottom, where it attaches to the forearm bone just past the elbow. The lower tendon is the main one used to twist the forearm - for example, turning a key or using a screwdriver - and provides a large part of that twisting strength.

A tear at the shoulder end usually happens in people over 50 whose tendon has gradually worn over the years, often alongside a rotator cuff problem. There is often a sudden pop at the shoulder, followed by bruising and a bulge in the upper arm (sometimes called a "Popeye" bulge). Interestingly, the shoulder pain often eases after the tendon snaps, because the worn tendon was itself the source of the ache. Most of these tears are treated without surgery, because the second tendon at the shoulder keeps the arm working well.

A tear at the elbow end is a different injury. It usually happens when a bent elbow is suddenly forced straight while lifting something heavy, such as catching a dropping weight. Without surgery, the arm permanently loses some of its strength for twisting the forearm and, to a lesser extent, for bending the elbow. Surgery to reattach the tendon is more straightforward in the first couple of weeks, because after that the muscle pulls back and tightens, making the repair harder.

Common causes

  • Long head of biceps: pre-existing tendon degeneration, rotator cuff tear, chronic impingement
  • Distal biceps: eccentric loading during heavy lifting (most common)
  • Anabolic steroid use (associated with increased risk of distal biceps rupture)
  • Direct trauma to the tendon

Who is at risk? For proximal ruptures: age over 50, rotator cuff pathology, previous steroid injections into the bicipital groove. For distal ruptures: male sex, heavy manual work, weightlifting, and anabolic steroid use.

Symptoms

Symptoms vary depending on the severity and duration of the condition. Common symptoms include:

  • A sudden pop or tearing sensation at the shoulder (proximal) or antecubital fossa (distal)
  • Immediate pain followed by bruising tracking down the arm
  • Popeye deformity (proximal): prominent muscle belly as the muscle retracts distally
  • Bruising and swelling in the antecubital fossa (distal rupture)
  • Loss of strength in forearm supination (distal), particularly turning a screwdriver
  • Positive Hook test in distal rupture - no cord palpable at the antecubital fossa

When to seek help: Distal biceps tendon rupture requires urgent assessment within 2-3 weeks as repair becomes significantly more difficult after this time. Proximal ruptures can be assessed electively.

How is it diagnosed?

Your surgeon will take a detailed history and examine the joint. The following investigations may be arranged to confirm the diagnosis:

  • Clinical examination - Popeye sign for proximal, Hook test for distal rupture (pathognomonic)
  • Ultrasound - confirms complete versus partial tear and assesses tendon retraction
  • MRI - gold standard; assesses both proximal and distal tears, extent of retraction, and associated rotator cuff pathology
  • X-ray - may show avulsion of the radial tuberosity in distal ruptures

The Hook test is the most sensitive and specific clinical test for distal biceps rupture. The examiner hooks a finger under the lateral biceps tendon cord at the elbow crease. If no cord is palpable, the test is positive and confirms distal rupture.

Treatment pathway

Treatment is tailored to the severity of the condition, your age, activity level, and overall health. Most conditions are treated in a stepwise fashion, starting with the least invasive options.

Proximal rupture (most patients)

Non-operative management

Rest, analgesia, and physiotherapy focusing on rotator cuff strengthening. The short head of biceps compensates for most of the lost function. A minor Popeye deformity and slight cramping with repetitive elbow flexion are the main long-term complaints.

Proximal rupture in selected patients

Biceps tenodesis

Reattachment of the long head of biceps to the proximal humerus (bicipital groove or subpectoral position) to relieve cramping symptoms and correct the cosmetic deformity. Preferred in younger, active patients and those with significant cosmetic concern.

Distal rupture (most patients)

Primary distal biceps repair

Surgical reattachment of the distal tendon to the radial tuberosity using cortical button fixation or suture anchors. Restores supination and flexion strength. Best performed within 2-4 weeks of injury before muscle retraction makes repair difficult.

Strength changes with and without distal biceps repair

For a complete distal biceps tendon rupture, the main long-term difference between having surgery and not having it is arm strength - particularly the strength used to twist the forearm (supination). The figures below are averages from the medical literature; individual results vary. Many lower-demand people manage well without surgery, especially if the lacertus (a fibrous band beside the tendon) is still intact.

Strength measureWithout repairWith repair
Forearm-twisting (supination) enduranceAround 50% reducedLargely restored
Forearm-twisting (supination) strengthAround 40% reducedLargely restored (about 95-100%)
Elbow-bending (flexion) strengthAround 30% reducedLargely restored
Grip strengthAround 15% reducedLargely restored

Because surgery mainly protects supination strength and endurance, it is more often recommended for younger or higher-demand people, and for the dominant arm. Repair is most straightforward within the first few weeks of injury - leaving it longer can make the operation more involved.

Recovery

After distal biceps repair, the arm is protected in a sling for 2-4 weeks followed by progressive physiotherapy. Heavy lifting is restricted for 3 months. Full strength recovery takes 4-6 months. Without repair, 30-40% loss of supination strength persists permanently.

  • Proximal: return to most activities: 6-12 weeks
  • Distal repair: sling: 2-4 weeks
  • Distal repair: restricted lifting: 3 months
  • Distal repair: full strength: 4-6 months

What results can I expect?

Non-operative management of proximal LHBT rupture gives satisfactory results in the majority of patients. Distal biceps repair restores 95-100% of supination strength compared with approximately 60-70% without repair. The outcome of repair deteriorates significantly when surgery is delayed beyond 4-6 weeks.

4 min · Animated explainer

Biceps tendon rupture - proximal and distal tears compared

In numbers
95–100%
supination strength after distal repair
compared with 60–70% without surgery
90–96%
of ruptures are proximal
most treated non-operatively with good results
2–4
weeks
window for easy distal repair, act promptly
4–6
months
to full strength after distal repair
What the evidence shows
Distal biceps repair is time-sensitive, surgery within 2–4 weeks gives the best outcomes before muscle retraction occurs
Proximal rupture is best managed non-operatively in most patients, the short head of biceps compensates well
The Hook test is pathognomonic for distal biceps rupture, a negative test virtually excludes the diagnosis
Without repair, patients sustain a permanent 30–40% loss of forearm supination strength
Tenodesis for proximal rupture corrects the Popeye deformity and reduces cramping with repetitive elbow flexion
When can I…?

Common activity questions for this condition. Timelines are approximate, always follow the specific guidance given by your surgeon and physiotherapist.

ActivityTypical timelineNotes
DriveWeeks 6–8When elbow has full comfortable movement and you are off opioid painkillers.
Sleep in bedWeek 2–3Sling off after 4 weeks for distal repair. Most sleep comfortably from week 2–3.
ShowerWeek 1–2Once wound is sealed and dressing in place.
Return to desk workWeeks 4–6Light keyboard and writing when comfortable.
Lift more than 1kgMonth 3Distal repair: no lifting restriction after 3 months. Full strength recovers by 4–6 months.
Manual workMonths 3–4Heavy manual work and supination-intensive tasks (turning screwdrivers etc.) at 3–4 months.
SportMonths 4–6Full sport when supination strength equals the other side, usually 4–6 months.
Is this normal?

Common concerns during recovery, and whether they are expected.

Yes. For proximal biceps ruptures treated non-operatively, the Popeye deformity (lump in the upper arm where the muscle has retracted) is permanent. It is cosmetic only and does not significantly affect function for most patients.
Yes, particularly after proximal rupture. Cramping with repetitive elbow flexion is common and usually improves over months. A tenodesis procedure can address it if it remains a significant problem.
Yes. Supination strength (turning palm up) recovers gradually after distal biceps repair and full strength at 3–6 months is typical. Compare with the other side, it should be approaching equal by 6 months.
Common questions

Your questions, answered

Plain-English answers to the things people most often ask, drawn from real patient questions and grounded in published guidance. Tap a question to open it.

SurgeryTenotomy or tenodesis, and will I get a "Popeye" bulge?

Both deal with a damaged long head of biceps tendon and often accompany rotator cuff or labral surgery. A tenotomy simply releases the tendon (quick, short rehabilitation); a tenodesis releases it and re-attaches it lower down to the bone. In good studies the two give broadly similar pain and function.

The main difference is the "Popeye" sign, a visible bulge from the released muscle bunching up, which is clearly more common after tenotomy (roughly one in four) than tenodesis (around one in fourteen), though rates vary. Tenotomy suits older or lower-demand patients; tenodesis is often chosen for younger or more active people, or where the bulge or cramping would bother you. Many people with a Popeye sign are not troubled by it.

Sources  Belk et al., tenotomy vs tenodesis meta-analysis
PreparingHow can I prepare, and what should I ask my surgeon?

A bit of preparation makes the first weeks much easier: get as fit and well as you reasonably can, set your home up so things are within reach of your good arm, sort loose front-opening tops and slip-on shoes, and arrange help for the first week or two if you live alone. If you have diabetes, flag it early, as it affects healing and the response to any steroid used around the operation.

Good questions to take to clinic include: exactly what is being done and why; how long in the sling and what type; when physiotherapy starts; what to expect at six weeks, three months and a year; the pain-relief plan and whether you will have a nerve block; when you can shower, drive, work and return to your sport; and the main risks, including the chance of re-tear.

Sources  British Elbow & Shoulder Society
AnaesthesiaWhat is a nerve block, and what happens when it wears off?

A nerve block numbs the nerves to the shoulder and arm, usually alongside a general anaesthetic, and gives excellent pain relief for roughly the first 10 to 24 hours. The arm often feels heavy and numb during that time, which is expected.

As it wears off, usually the evening or night after surgery, pain can return quite suddenly ("rebound pain"). This is well recognised and not a sign anything is wrong. Start your prescribed pain relief on schedule before the block fully wears off, so you stay ahead of it. A hoarse voice, a drooping eyelid, or a feeling of breathlessness can occur as the block spreads to nearby nerves; these settle as it wears off, but tell your anaesthetist beforehand if you have significant lung disease, asthma or sleep apnoea.

Sources  ASRA · StatPearls / OpenAnesthesia
Pain & sleepHow will I sleep, and how long will I be in the sling?

Sleep is one of the hardest parts of early recovery. Many people sleep semi-upright in a recliner or well propped up, supporting the operated arm on pillows, and keep the sling on at night for as long as the surgeon advises. Expect broken sleep for several weeks and try not to measure recovery by it.

Sling time varies with the operation, commonly around the first six weeks for a repair. Neck and upper-back ache from the strap is very common; easing and padding the strap helps, as do gentle hand, wrist and elbow movements. Do not stop the sling early just to get comfortable; wait until your surgeon clears it.

Sources  NHS community MSK service
Pain & medsWhat can I take for pain, and what if I cannot tolerate strong painkillers?

Pain is usually managed with a combination: the nerve block, regular paracetamol, an anti-inflammatory if safe for you, a short course of a stronger painkiller for the first few days, and ice. Using several milder approaches together often works better, with fewer side effects, than one strong drug.

If opioids make you sick, or you cannot take anti-inflammatories (stomach, kidney, heart or stroke history), this is common, so tell your team in advance to plan around it. One point that causes confusion: ketorolac (Toradol) is an anti-inflammatory given by mouth, muscle or drip, not an injection into the shoulder joint. Your prescriber decides what is safe for you.

Sources  NHS community MSK service
Wound & scarsHow do I look after the wound and scars, and when can I shower?

Showering depends on your dressings and your surgeon's advice, so follow the instruction you were given. Keyhole wounds are small, but the skin around them can feel dry, tight or crispy and catch on clothing; a loose dressing stops it rubbing, and once fully healed a plain moisturiser can settle the dryness.

The incision points can stay tender for several weeks, which is normal. Once healed, gentle scar massage (your physiotherapist can show you) reduces sensitivity over time, and it is worth protecting healing scars from strong sun. Do not put creams on a wound that is not yet closed, and report spreading redness, heat, discharge or fever.

Sources  NHS community MSK service
Getting backWhen can I drive and return to work?

There is no single fixed date, and it is ultimately your responsibility to be safe and legal. As a rough guide, UK services often suggest driving around six to eight weeks after a repair, when you can control the car and perform an emergency stop confidently without significant pain, and you are not taking medication that affects alertness. It is also sensible to check your motor insurance position first.

Desk work is often possible around six to eight weeks, and heavier manual work around four to six months, depending on the job and the operation. Your surgeon's specific advice always takes priority.

Sources  NHS community MSK service · Hospital for Special Surgery
WellbeingIs it normal to feel low during recovery?

Yes, and it is talked about far too little. Frustration, low mood, isolation and poor sleep are common while you are in a sling and reliant on others, and it does not mean recovery is going badly. Keeping gently active within your limits, staying connected to people, and marking small milestones all help.

If low mood is persistent, deepening, or affecting daily life, please speak to your GP. Effective support is available and asking early is a strength.

Sources  General clinical guidance
Your choiceCan I ask for a second opinion?

Yes. Wanting to understand your diagnosis and feel heard is reasonable, and a second opinion is a normal part of healthcare, not a criticism of anyone. You are entitled to ask your clinician to explain your scan and the reasoning, what the alternatives are, and what happens if you do nothing.

If you are still unsure, another shoulder specialist's view is a legitimate next step. Bring your imaging and a written list of questions, and be specific about your goals and what the shoulder stops you doing.

Sources  General clinical guidance
UrgentWhen should I seek urgent help?

Most shoulder problems are not dangerous, but a few warning signs deserve prompt attention: an unexplained lump that is enlarging, deep or larger than a few centimetres; constant pain at rest and at night that is steadily worsening; feeling generally unwell with weight loss, fevers or night sweats; a sudden inability to lift the arm after an injury; signs of wound infection after surgery (a firm, warm, enlarging or increasingly tender area, spreading redness, discharge or fever); signs of a possible blood clot (new calf pain or swelling, or chest pain or breathlessness); or pain not relieved at all by your prescribed medication.

If you are worried, contact your GP or, after surgery, your surgical team. If you are acutely unwell, use NHS 111 or urgent care.

Sources  NICE NG12 & Cancer Research UK · British Elbow & Shoulder Society

Preparing for surgery?

Read our step-by-step guide - what to expect before, during, and after your procedure.

🩺 How is it diagnosed?

  • Clinical examination - Popeye sign for proximal, Hook test for distal rupture (pathognomonic)
  • Ultrasound - confirms complete versus partial tear and assesses tendon retraction
  • MRI - gold standard; assesses both proximal and distal tears, extent of retraction, and associated rotator cuff pathology
  • X-ray - may show avulsion of the radial tuberosity in distal ruptures

🕐 Recovery milestones

  • Proximal: return to most activities: 6-12 weeks
  • Distal repair: sling: 2-4 weeks
  • Distal repair: restricted lifting: 3 months
  • Distal repair: full strength: 4-6 months
More on Biceps tendon rupture: Surgery guide & recovery →  ·  All conditions