Few children see a GP about the elbow, and what's common changes with ageEmerging evidence
Elbow pain is an uncommon reason for a child to see a GP. In 12 English practices, the elbow accounted for 8 consultations per 10,000 children aged 3 to 17 a year (23 in boys aged 14 to 17), fewer than the wrist (19) or the shoulder (13), and it wasn't among the 12 commonest places children had problems. In 2,953 Danish 12 to 19 year olds, 2.6% had elbow pain on the day they were asked, against 13.3% for the shoulder. Most children's elbow problems are injuries seen in emergency departments rather than aches that build up (our reading of these figures).
What is common depends on age. In toddlers it is a pulled elbow; in school-age children, a break after a fall, most often at about 6 to 8; in teenagers, overuse in throwing and gymnastics, and breaks of the bony bump on the inside of the elbow. Some groups are affected more often (links, not causes): boys in throwing injuries (310 of 317 children with Little League elbow at one US centre) and, in some studies, in elbow fractures (1.6 boys to each girl in Okinawa, though 54% were girls in Denmark); girls in pulled elbow in most countries, though not in Japan; children with very flexible joints among those whose pulled elbow keeps coming back; and young throwers who pitch a lot, pitch while tired or sore, or play all year.
Sources 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
Toddlers: a pulled elbow is common, and it isn't always a pullStrong evidence
A pulled elbow (the medical name is radial head subluxation, and it is also called nursemaid's elbow) happens when the top of one of the two forearm bones, the radius, slips partly out of the ring of ligament that holds it at the elbow. It is common: in Aberdeen, 1.2% of young children had one each year, which would mean about 50,000 a year across Great Britain, and in the US it leads to over 20,000 emergency department visits a year, 68.6% of them at ages 1 and 2. In 1,307 children treated at one Japanese hospital, the commonest ages were about 6 months and 2 years, and NHS trust leaflets say it rarely happens after about 5 or 6.
It isn't always a pull. Of those 1,307 Japanese children, 51% had been pulled by the arm, 14% had fallen, 6% had rolled over in their sleep (more often babies), 2% had a knock to the elbow, and for 24% no one knew. No pull was found in 49% of 87 US episodes, and in two large sets of US emergency records falls were at least as common as pulls. "It does not mean that anyone has pulled too hard on the child's arm," an NHS trust leaflet says: some children are prone to it because of the shape of their growing bones.
The signs are typical: the child cries, then holds the arm still by their side or across the tummy, won't use it, and seems fine until the elbow is moved, with no obvious swelling or deformity. A child who fell, or whose elbow is swollen or bruised, may have a break instead, which is why that story changes what happens at hospital.
Sources 15, 3, 4, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25
School-age children: falls, and breaks around the elbowStrong evidence
Elbow fractures are common in children: 308 per 100,000 Danish children under 15 a year, at an average age of 7.9, and 58% of them were just above the elbow (supracondylar fractures). In 488 elbow fractures in Okinawa, Japan, the commonest age was 6; 43.8% were supracondylar and 22.3% were on the outer side (lateral condyle fractures), the second commonest. In Swedish children and teenagers, the lower end of the upper arm bone accounted for 5% of all fractures and the top of the forearm for 3%. Under 6, most follow falls indoors, from chairs, sofas and beds; at 6 to 10, falls from play equipment and trees and tumbles from skateboards. Monkey bars and trampolines are common causes, US orthopaedic surgeons say, and the Royal Society for the Prevention of Accidents (RoSPA) lists the elbow among the commonest trampoline injuries.
Being able to move the elbow doesn't rule out a break. In 778 children in 5 English emergency departments, 12 of the 287 followed up who could fully straighten the injured elbow had a fracture (4.2%), none needing an operation, against 210 of 491 (43%) who couldn't. A raised "fat pad" on the X-ray with no visible break means a hidden fracture in many children: 44.6% across 10 studies of 250 children, though the true figure could lie anywhere from about 30% to 60%, and 34 of 45 (76%) in one series.
Breaks of the bony bump on the inside of the elbow (the medial epicondyle) make up to 20% of children's elbow fractures, mostly at 9 to 14, and about 60% come with a dislocated elbow; in boys of about 14 and 15, arm wrestling causes some. Outer side fractures that have moved by more than about 2 mm are usually fixed with pins or screws, a review of their treatment says, and failing to join is uncommon: 7 of 500 children (1.4%) in one US centre.
Sources 5, 6, 26, 27, 28, 29, 30, 31, 32, 33, 8, 34, 35
Complications of a broken elbow: uncommon, and most recoverStrong evidence
UK standards ask doctors to check and record the pulse, the blood flow to the fingers and each nerve in the hand for every child with a supracondylar fracture. About 11% of these fractures come with a nerve injury (11.3% across 40 studies of 6,850 children), and most recover within 2 to 6 months. When the hand stays pink but has no pulse, the pulse came back within 24 hours in 61% of children after pinning alone and in 94% after the artery was explored, with similar long-term function.
Compartment syndrome, a build-up of pressure in the forearm muscles that needs urgent surgery, is rare: 21 of 4,308 children admitted with a supracondylar fracture (0.49%), and it happened in some children with none of the usual risk factors. In 33 children with compartment syndrome in an arm or a leg at one US hospital, the classic signs, such as paleness, tingling or a missing pulse, were unreliable, while a rising need for pain relief, together with other signs, was the more sensitive warning. That is why the warning signs ask you to act on pain that keeps getting worse.
Sources 36, 37, 38, 39, 40
Young throwers and gymnasts: overuse at a growth plateStrong evidence
Little League elbow is a strain on the growth plate of the bony bump on the inside of the elbow, from repeated throwing. It is most common at 8 to 15 but can happen up to 17 while the growth plate is open, the American Academy of Pediatrics says, and it is mostly seen in pitchers. Half of 476 US pitchers aged 9 to 14 had elbow or shoulder pain during one season. In 754 young pitchers, those who often pitched with arm pain had 7.5 times the odds of a pitching injury, and in 481 followed for 10 years, pitching more than 100 innings a year went with 3.5 times the risk of a serious injury (5% had one over the 10 years). Of 37 young throwers whose bony bump pulled off, 31 had elbow pain first.
On the outer side, osteochondritis dissecans (OCD) is a problem with the joint surface at the rounded end of the upper arm bone (the capitellum). Ultrasound screening in Japan found it in 3.4% of 2,433 teenage baseball players and 2.1% of 1,040 aged 10 to 12, and about a third of the younger players who had it had never had elbow pain. In gymnasts it typically shows at 10 to 14, and about 10% have it in both elbows. Early X-rays can miss it: first X-ray reports showed it in only 7 of 15 confirmed cases. Under 10, outer elbow ache and stiffness can be Panner's disease, which is very rare, mostly affects boys and settles on its own.
Sources 7, 41, 12, 13, 42, 43, 44, 45, 46, 47
Rare causes, and why it isn't tennis elbow or growing painsStrong evidence
A joint infection (septic arthritis) is rare: 2 to 7 per 100,000 children a year in Europe, mostly in the knee and hip. The elbow is an unusual place for it, which can delay the diagnosis: in one US series of 12 children with an infected elbow, 7 also had a bone infection, and in another series of 7, all were under 5. A bone infection (osteomyelitis) affected 13 per 100,000 Norwegian children a year, about 3 times more often under 3, and young children don't always get a high temperature with it, the NHS says.
Juvenile arthritis affects at least 10,000 young people under 16 in the UK, with swollen joints and stiffness, especially in the morning or after rest. The elbow was involved in 8.1% of 1,065 children with it, most often in the type that affects many joints, and in another clinic the elbow carried a large share of the joint damage. Bone tumours are very rare: each year about 35 children in the UK develop an osteosarcoma and about 30 a Ewing sarcoma, and the pain often comes and goes at first, then becomes constant, especially at night. The National Institute for Health and Care Excellence (NICE) asks GPs to arrange very urgent tests for unexplained bone pain or swelling in a child.
Two common labels don't fit. Tennis elbow is an adult problem, mostly at 35 to 54, and a UK care pathway treats elbow pain in a child or teenager as a reason for referral to a specialist, not routine tennis elbow care. And the NHS describes growing pains as leg pain in children aged 3 to 12; no source we found says they affect the arms.
Sources 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61
When a scan or test helpsStrong evidence
A typical pulled elbow needs no X-ray, because there is no break and the ligament doesn't show on one. An X-ray is for a fall, swelling, bruising, a tender bone, an unclear story, an older child, or an arm still not used after treatment, because a few children first thought to have a pulled elbow turn out to have a fracture. Some emergency departments use a quick ultrasound scan at the bedside: fluid in the joint suggests a fracture and means an X-ray.
After a fall, a child who won't use the arm or has a swollen elbow needs an X-ray even if they can move it. A fat pad with no visible break is treated as a hidden fracture, and the fracture clinic follows it up.
In young throwers, X-rays, sometimes of both elbows to compare, look at the growth plate, though they "may show nothing abnormal", the American Academy of Pediatrics says. Magnetic resonance imaging (MRI) shows OCD that early X-rays miss and whether it is stable, and ultrasound screening finds early OCD in research programmes in Japan. A suspected joint infection needs blood tests, X-rays and often MRI in hospital, because a bone infection is often present too. For unexplained bone pain or swelling, NICE asks GPs to consider a very urgent X-ray and to offer a very urgent blood count.
Sources 23, 62, 63, 64, 65, 4, 66, 67, 29, 27, 30, 31, 7, 45, 46, 43, 44, 49, 68, 59
How it usually goesEmerging evidence
A pulled elbow: most children use the arm again within minutes of it being put back (76.8% within 10 minutes in one US series, more slowly under 2, and 53 of 54 within 30 minutes when a click was felt), and in the Japanese hospital's series 16% had gone back on their own before the child was seen. "Most children will forget about their arm injury within the first few days," an NHS trust says. It comes back in about 1 in 20 to 1 in 4 children (4.8% to 26.7% across studies), most often in those aged 2 or under, becomes rare after about 5 or 6, and leaves no long-term problems.
A broken elbow: casts or splints usually stay on for 3 to 6 weeks, and NHS Lothian's children's physiotherapists expect about 10 to 12 weeks for the injury to heal, adding that "It can sometimes take many months to fully regain your elbow range of movement". After pinning, elbows reached 72% of the other side's movement at 6 weeks, 86% at 12, 94% at 26 and 98% at a year, and in a larger group gains continued for up to 48 weeks, more slowly in children over 5 and after surgery. Nerve injuries mostly recover within 2 to 6 months.
The throwing elbow: at one US centre, children with Little League elbow returned to sport after a median of 12 weeks, and pain came back in 13%, a median of 2 years later (a conference report). Early, stable OCD healed in 90.5% with at least 6 months off heavy elbow use, taking 14.9 months on average, but in only 22.7% of children who didn't follow that advice. Panner's disease settles on its own, and a bone infection treated within 3 to 5 days of starting often clears up completely. No one can promise a timescale.
Sources 18, 69, 4, 65, 10, 70, 16, 17, 71, 27, 72, 73, 74, 37, 9, 75, 47, 52