Elbow pain when bending your arm: the biceps tendon, the nerve, stiffness, children and what helps

Which muscles bend the elbow, and what bending squeezesStrong evidence

Bending the elbow uses the brachialis in every hand position, the biceps most when the palm turns up, and the brachioradialis. The biceps' main job is turning the palm up, so biceps tendon pain is, in an NHS referral guide's words, "anterior elbow pain, typically deep in the antecubital fossa on resisted supination": deep in the crease when you bend against resistance and turn the palm up.

Bending also squeezes and stretches the ulnar nerve behind the inner bump, and presses a swollen bursa on the point of the elbow at full bend. Most daily tasks need about 30 to 130 degrees of bend, but using a phone needed up to 142 degrees in a lab study, so losing the last part of bending matters for the face, hair and phone.

Sources 1, 2, 3, 4, 5, 6, 7

The front of the elbow: the biceps tendon, the brachialis and normal sorenessEmerging evidence

A gradual ache deep in the crease, worse lifting and turning the palm up, is usually the biceps tendon: an overloaded tendon or a partial tear. Sources disagree on how common it is, and no exercise trial for it was found.

The brachialis tendon can hurt in climbers, but a climbing review says these injuries "are seldom seen outside of climbing". New curls, chin-ups or lowering work make the elbow benders very sore for a few days: in 203 volunteers after hard lowering work, a quarter had muscle enzyme levels above the level used to diagnose muscle breakdown, yet none had kidney changes, and one bout protects against the next.

Sources 2, 8, 9, 10, 11, 12, 13, 14

A torn biceps tendon: uncommon, but time-sensitiveStrong evidence

A full tear of the biceps tendon at the elbow is uncommon: about 1 to 5 people in 100,000 a year, about 95% of them men, with an average age of about 46. It usually happens when a bent elbow is forced straight by an unexpected heavy load: a pop, then swelling and bruising at the front of the elbow and forearm, a bulge in the upper arm and weakness turning the palm up. The pain can ease after a week or two.

The NHS website has no page on it. NHS Lothian's referral guide sends a suspected tear to an orthopaedic doctor the same day, and one NHS fracture clinic arranges a specialist "within two weeks of your injury"; US orthopaedic surgeons say repair is ideally done "during the first 2 to 3 weeks". That is why a pop with bruising needs checking the same day, even when it stops hurting.

Sources 15, 16, 17, 1, 18, 19, 20

The inside of the elbow and tingling fingers: the ulnar nerveStrong evidence

The ulnar nerve at the elbow is the second commonest trapped nerve in the arm after carpal tunnel syndrome: about 25 men and 19 women in 100,000 a year see a UK general practitioner (GP) about it, most often at 55 to 64. In cadaver arms, full bending shrank the nerve by up to half and stretched it, which is why UK hand surgeons say leaning on the elbow, holding it bent (on the telephone, for example) and sleeping with it bent bring on tingling in the ring and little fingers.

In clinic, bending plus pressure on the nerve for 30 seconds reproduced symptoms in 91% of people with the condition, but bending alone in only 32%. With phones it's the bent-elbow posture rather than the hours of use that mattered in one small study.

Sources 21, 22, 3, 23, 24, 4, 25, 26, 27

The point of the elbow, the outside, and a stiff elbowEmerging evidence

With olecranon bursitis, NHS Lothian says elbow movement "should be painless except at full flexion when the swollen bursa is compressed". It is commonest in men aged 30 to 60 and in jobs that lean on the elbow. An infected bursa is usually tender, red and warm, but only 38% had a fever in pooled series, so a normal temperature doesn't rule infection out.

Tennis and golfer's elbow hurt at the bony bumps with gripping and wrist movement, and elbow movement is "usually preserved"; the NHS lists "lifting or bending your arm" among tennis elbow's triggers. An elbow that won't bend fully is usually stiffness after an injury or arthritis, which mostly follows an old injury: in a random sample of 318 Japanese people over 50, arthritis showed on X-ray in a quarter but caused symptoms in under 1 in 100. A 2025 review puts stiffness after an elbow injury at about 10% to 15% of people.

Sources 5, 28, 29, 30, 31, 32, 33, 34, 35

Children: a pulled elbow or a fractureStrong evidence

A young child who suddenly won't use an arm after it was pulled or swung most often has a pulled elbow, which a doctor or nurse can usually put back in minutes; an X-ray isn't usually needed. It came back in 14% of 2,331 cases, and turning the palm down to put it back worked first time more often than turning it up (9 trials, 906 children).

After a fall it's different: a fracture just above the elbow made up 58% of 355 elbow fractures in Danish children, and a child who falls and won't use the arm needs an X-ray.

Sources 36, 37, 38, 39, 40, 41

What a scan or test shows, and what it doesn'tMixed evidence

After a fall, 46% of people who couldn't fully straighten the elbow had a fracture, while being able to straighten it fully largely ruled one out in adults (98.4%), less so in children (95.8%). For a suspected biceps tear, examination with the hook test comes first: it found all 33 complete tears in one surgeon's patients, but only 78% in a larger series and 30% of partial tears. Magnetic resonance imaging (MRI) found 92% of complete tears but only 59% of partial tears in 46 operated people; biceps changes on MRI were rare in elbows without symptoms (0.6% of 1,191).

For tingling with a bent elbow, NHS referral guides need no imaging in primary care, and 76% of people with typical symptoms had normal nerve tests in a trial, most of whom improved. An X-ray for a stiff elbow helps when the diagnosis is uncertain or symptoms suddenly worsen; X-ray arthritis is common and mostly silent.

Sources 42, 1, 43, 44, 45, 46, 47, 48, 49, 32, 33

How it usually goesEmerging evidence

Half of bursitis that isn't infected settles within 2 weeks and three-quarters within 8. Biceps tendon pain "Can improve within weeks to months" and may persist for several years. With the ulnar nerve, 89.5% improved with advice over 6 months in a trial; tennis and golfer's elbow improve in 80% to 90% over 1 to 2 years. Most children with a pulled elbow use the arm normally within about 20 minutes of it being put back. After a biceps repair, heavy activity usually returns after about 4 to 6 months. No one can promise a date.

Sources 5, 2, 47, 30, 36, 1

Keep it moving: the health-service adviceStrong evidence

NHS inform says, for the first 48 hours, "move your elbow gently for 10 to 20 seconds every hour when you're awake", then "try to use your elbow more", and "You don't need to be symptom free before you consider returning to work". Arthritis UK says "it's best not to rest for more than a few days". Even for a possible biceps injury awaiting review, an NHS fracture clinic asks for gentle bending and straightening within the pain-free range, while avoiding heavy lifting for 6 weeks. These are health-service advice rather than trial results.

Sources 50, 31, 20

Tingling with a bent elbow: position changes firstStrong evidence

In the only trial, 70 people with mild or moderate symptoms were all given an explanation and advice: 89.5% of those followed for 6 months improved, and night splints and nerve glides added nothing. In a small group using a rigid night splint and activity changes, 21 of 24 arms avoided surgery over about 2 years, with no comparison group. A Cochrane review of 15 trials says information on positions to avoid may help mild cases, from one small trial.

NHS Lothian's advice is to avoid long bends and pressure on the nerve and to sleep with the elbow straight, using "a towel wrapped around arm/elbow/forearm rather than an elbow splint, which is poorly tolerated", "every night for at least three months even if no immediate benefit is seen". US orthopaedic surgeons say steroid injections "are generally not used" because of the risk to the nerve. Surgery is for severe or persistent cases, mainly to stop weakness getting worse, and simple release does as well as moving the nerve.

Sources 47, 51, 22, 49, 24, 4

Exercise for the front of the elbow and a stiff elbow: borrowed and untestedEmerging evidence

No trial has tested exercise for biceps tendon pain. A 2026 review of 30 studies found no high-quality comparison, though both surgery and non-surgical care, including lowering exercises, improved pain. The plan borrows the tennis elbow approach (holds, then slow lifting and lowering), as our distal biceps guide does.

For stiffness, an NHS hand therapy leaflet bends and straightens 20 times, holds a bending stretch for 3 to 5 minutes, which "may be uncomfortable but not painful", and does curls "10-20 times, 2-3 times per day". NHS inform's elbow exercises build from 2 or 3 at a time to "a maximum of 2 sets of 15". Hold-relax stretching helped early stiffness after an injury in 3 small trials, too few to pool.

Sources 9, 52, 53, 54, 55

A torn biceps tendon: repair or notMixed evidence

Repair restores more palm-up strength: across 53 mostly small, low-level studies, palm-up strength was 89% of the other arm after repair and 63% without it. Newer series of people who chose no repair found smaller losses of about 11% to 13%, so the loss without repair is somewhere between about a tenth and a third; the often-quoted 30% to 40% comes from 3 untreated people in 1985. Almost all UK elbow surgeons repair acute tears, while noting a lack of trial evidence that surgery does better.

"Your tendon will not reattach to the bone without an operation", an NHS trust says, but the arm usually still works reasonably well, and some people, such as older or less active people or with the non-dominant arm, choose not to have it. Repair is easiest early: in one series, over 3 in 4 people with a positive hook test 8 weeks or more after the injury needed a tendon graft, though late repairs often still do well. Complications follow about 1 in 4 repairs, major ones about 1 in 20, and most nerve problems settle.

Sources 56, 57, 58, 59, 60, 61, 62, 1, 18, 63, 44, 64, 65

Partial tears and tendon pain: most settle without surgeryMixed evidence

NHS Lothian says "Most patients improve with non-operative management". In 78 people with partial tears, 47% had succeeded at 6 months, with wait and see, physiotherapy and an injection doing about the same, and no partial tear became complete. In another series of 61, 56% went on to surgery, more often when the tear was larger on MRI, and trying non-surgical care first didn't make people less satisfied if they later had surgery.

Sources 2, 66, 67, 62

Lifting and carrying: close to the body, and no catching heavy loadsEmerging evidence

The Health and Safety Executive says "Keep the load close to your waist" and "hug the load as close as possible to your body"; NHS inform's tennis elbow advice adds lighter loads and breaks. The biceps tendon tears when a bent elbow is forced straight by a sudden heavy load, so don't catch or snatch heavy loads. Palm-up effort loads the biceps tendon most, so thumb-up holds may suit front-of-elbow pain for now: that is our reading, and no trial has tested it.

Sources 68, 69, 1, 2

Other treatments: bursitis, arthritis and the nerveEmerging evidence

For bursitis, the NHS says take pressure off the elbow, use padding and see a GP if it isn't better in 1 to 2 weeks; a GP may take a fluid sample if it's hot. For elbow arthritis, activity changes, anti-inflammatory medicines, physiotherapy and sometimes an injection come first, and loose pieces "can be removed with keyhole surgery". For the nerve, UK hand surgeons say position changes "may be curative in early cases" and that strength often comes back slowly and incompletely after surgery.

Sources 70, 5, 31, 34, 24

Lifting, carrying and turning (written steps)

Our 3D figure can't show these. They come from NHS inform, the Health and Safety Executive and US orthopaedic surgeons; where a step is our suggestion, it says so.

• 1. Keep it moving: gently, for 10 to 20 seconds every hour for the first 48 hours, then use it more (NHS inform).
• 2. Lift and carry close to the body, with lighter loads and breaks (the Health and Safety Executive and NHS inform).
• 3. Don't catch or snatch heavy loads, especially with the elbow bent: test the weight first and share it or use a trolley (US orthopaedic surgeons say this is how the biceps tendon tears).
• 4. With pain at the front: thumb-up rather than palm-up holds for now, and a power screwdriver or the other hand for tight screws, keys and lids (our suggestion; palm-up effort loads the biceps tendon most).
• 5. In the gym: lighter curls with slow lowering, hammer grips, and rows and pulldowns with a neutral grip; heavy chin-ups and cheat curls come back last (our suggestion).

Sources 50, 68, 69, 1, 2

With tingling: the phone, the car, the desk and sleep (written steps)

These come from UK hand surgeons, NHS Lothian and US orthopaedic surgeons.

• 1. Use a headset or the speaker for calls rather than holding the phone to your ear (UK hand surgeons).
• 2. Don't lean on the inside of the elbow; use soft pads, or rest the forearm rather than the elbow (UK hand surgeons and NHS Lothian).
• 3. At night, sleep with the elbow straight, with a folded towel wrapped round the elbow, every night for at least three months even if it doesn't help at first, as NHS Lothian advises.
• 4. In the car, don't rest your arm on the open window or the armrest, and avoid keeping the elbow bent for long (US orthopaedic surgeons).
• 5. Break up long tasks with the elbow bent, such as reading a tablet or a book in bed (NHS Lothian suggests earphones and book supports).

Sources 24, 49, 4

A swelling on the point of the elbow, and children (written steps)

These come from the NHS and NHS trust emergency department leaflets.

• 1. Take pressure off the swelling: no leaning on it, padding when you kneel or lean at work, and extra cushions around it while you sleep (the NHS).
• 2. See a GP if the swelling isn't better after 1 to 2 weeks (the NHS).
• 3. Never lift or swing a young child by the hands or arms: lift under the arms (NHS trust leaflets).

Sources 70, 36, 37