Most forearm pain starts at the elbow or the wristStrong evidence
Forearm pain on its own is rarely the whole story. In a south-east England community survey, 4% to 5% of adults had forearm pain; over 95% of them had pain elsewhere too, most often the elbow and wrist, and the authors concluded that forearm pain on its own is of little use as a diagnosis. Most of the specific causes start at the elbow or the wrist: the NHS lists pain in the forearm among tennis elbow's symptoms, and NHS inform says golfer's elbow pain may spread down the forearm, that elbow problems can cause pain in the muscles down to the wrist, and that wrist and hand problems can cause pain and stiffness in the forearm.
In a survey of 9,696 working-age adults, of whom 1,960 with arm symptoms were examined, tennis elbow was found in 1.3% of men and 1.1% of women, and de Quervain's, on the thumb side of the wrist, in 0.5% and 1.3%. The NHS says tennis elbow is most common between 35 and 54, and lists computer work, manual tasks such as using a screwdriver, and leisure activities among its causes, not only tennis. So this guide says a spot points to a cause rather than proving it, and an examination decides.
Sources 1, 2, 3, 4, 5, 6
Work, computers and the rest of lifeEmerging evidence
In 1,953 adults in Greater Manchester followed for 2 years, 8.3% developed forearm pain. Repetitive arm movements (a relative risk of 4.1) or wrist movements (3.4) at work, poor support from colleagues or managers (4.7) and psychological distress (2.4) all raised the risk, and most people with the new pain also had shoulder or back pain. In 782 newly employed workers from 12 occupations, monotonous work and little control over it predicted new forearm pain as well as repetitive movements did.
In 6,943 Danish computer users, more than 30 hours a week of mouse use and more than 15 hours of keyboard use raised the risk of new forearm pain, but clear disorders were rare: 16 of 296 people with forearm symptoms met the criteria for one. The Health and Safety Executive (HSE) lists repetitive work, awkward postures, force, long tasks without breaks and long use of hand-held power tools as risks, and the NHS adds that many people do the same job for years without a problem. Pain like this is about the job and the load, not a weakness in the person.
Sources 7, 8, 9, 10, 11
Tingling points to a nerveEmerging evidence
Tingling, numbness or pins and needles usually mean a nerve. In the thumb, index and middle fingers, often worse at night, it's usually carpal tunnel syndrome, which the NHS says can also cause an ache or pain in the fingers, hand or arm. In the ring and little fingers, it's usually the ulnar nerve at the elbow.
Rarer nerve problems sit in the forearm itself. Pronator syndrome, where the same nerve is squeezed higher up, causes a vague ache in the front of the forearm with tingling, and a review calls it a controversial diagnosis that is treated without surgery first; nerve tests are usually normal in it. A related problem, anterior interosseous nerve syndrome, is a pure weakness of some thumb and finger muscles that often settles on its own over months. Radial tunnel syndrome, below the outer elbow, is uncommon and debated. And NHS inform says problems felt at the elbow can come from the neck, even when the neck doesn't hurt.
Sources 12, 13, 14, 15, 3
Above the wrist on the thumb side: intersection syndromeEmerging evidence
A few finger-widths above the wrist on the back of the forearm, two thumb muscles cross the tendons that pull the wrist back. Pain and swelling there, sometimes with a creak you can feel, is intersection syndrome; surgeons who operated on 13 people found irritation of the wrist tendons' sheath. In one hospital it was 0.37% of 8,080 people with arm or hand pain: all 30 had forearm pain, 73% had swelling and 40% had a creak, most were male farmers, and the pain came with repeated twisting and bending of the wrist towards the thumb. It responded well to changes to work and painkillers, with one person also needing a splint.
Sources 16, 17
Climbing and other grip sportsEmerging evidence
In sport climbers, the elbow, forearm, wrist and hand made up 62% of injuries in the data one review drew on, mostly golfer's elbow, the brachialis and biceps tendons at the front of the elbow, a ligament sprain at the inner elbow, carpal tunnel syndrome and tears of the finger pulleys. In 911 climbing injuries seen at one clinic, finger injuries made up 52% and the shoulder came second. No study was found of forearm muscle strains from gripping as a problem of their own, so forearm pain in climbers is usually one of the causes on this page.
Sources 18, 19
Rare in grip sports: a stress fracture or compartment syndromeEmerging evidence
Stress fractures of the arm are uncommon. In a series of 44 upper limb and rib stress fractures, all of those in athletes who take weight on their hands (gymnasts, divers and cheerleaders) were below the elbow. A 2024 review says stress fractures of the shaft of the ulna are much less common than other arm sites, classically in 13 to 16 year old female athletes whose sport twists the forearm, such as softball, tennis, golf and baton twirling. The forearm hurts with activity and when pressed or turned; X-rays don't always show it, so a magnetic resonance imaging (MRI) scan is recommended if suspicion remains, and nearly all athletes make a full recovery after 6 to 8 weeks off the activity.
Exertional compartment syndrome of the forearm is also rare, and the evidence is small case series: 12 people treated with surgery over 14 years at one UK centre, 24 motocross racers and 6 elite rowers. Pain, tingling further down the arm and loss of grip build during the activity and settle completely between sessions. The NHS asks you to see a GP if you keep getting pain, numbness or swelling when you exercise.
Sources 20, 21, 22, 23, 24, 25
After an injury: a broken bone or acute compartment syndromeStrong evidence
After a fall or a blow, an arm that is painful, swollen, bruised and hard to move, or that changes colour or shape or feels numb, may be broken, the NHS says, and needs an X-ray.
Acute compartment syndrome is a build-up of pressure inside a muscle that cuts off its blood supply. In 684 reported cases in the forearm, 65.4% followed a broken bone, most often just above the elbow, 30.7% a soft-tissue injury such as a crush or a heavy blow, and 3.9% an injured blood vessel. Surgeons' standards name pain far worse than the injury explains, and pain when the muscles are stretched, as the key signs, and the NHS says it needs surgery as soon as possible.
Sources 26, 27, 25, 28
Causes that aren't the arm itselfStrong evidence
The NHS says call 999 if arm pain comes on suddenly with pressure, heaviness or squeezing across your chest, and get help from NHS 111 if your arm hurts when you exercise but the pain goes away when you rest. Angina, a sign of a heart problem, can cause sudden pain in the chest, neck, shoulders, jaw or arms, often brought on by exercise and easing with rest.
The NHS's blood clot signs (throbbing pain, swelling, red, blue or darkened skin and swollen veins) can sometimes happen in the arm. Painful, hot, swollen skin can be cellulitis, a skin infection. Bone pain that is worse at night, or a lump, needs a GP: rarely, it is a bone tumour.
Sources 29, 30, 31, 32, 33
When a scan or test helpsStrong evidence
Tennis and golfer's elbow are diagnosed from the story and an examination. The American Academy of Orthopaedic Surgeons (AAOS) says a nerve test (electromyography, EMG) may be used to rule out a squeezed nerve, because its symptoms can be similar. If a clinician isn't sure it's carpal tunnel syndrome, a nerve conduction test or a scan can help; in pronator syndrome, nerve tests are usually normal.
A suspected stress fracture needs an X-ray, and an MRI if the X-ray is normal but suspicion remains, because an early X-ray can't show bone swelling. Exertional compartment syndrome is confirmed by measuring the pressure in the muscles before and after exercise. A swollen, throbbing arm needs an ultrasound scan, which the NHS says should happen within 24 hours if a doctor thinks it's a clot.
Sources 34, 12, 13, 21, 35, 25, 31
How it usually goesEmerging evidence
In the community survey, 76% of people with forearm pain had recovered 2 years later, and pain lasting more than 2 years was rare. NHS inform expects new elbow, wrist and hand problems to begin to settle within 6 weeks, and the HSE says people with upper limb disorders usually recover completely if the problem is recognised early and treated appropriately.
Tennis elbow can take months. In the groups given no active treatment in 24 trials (1,085 people), half of those still sore improved every 2.5 to 3 months, and about 89% were much better or recovered at a year. The NHS says it can sometimes last over a year, and the AAOS says 80% to 95% of people do well without surgery. A forearm stress fracture usually heals after 6 to 8 weeks off the activity. No one can promise a date.
Sources 5, 36, 1, 34, 3, 4, 10, 21
