Humerus Fracture Recovery Without Surgery

Most humerus fractures heal successfully without surgery. For shaft fractures treated with a functional brace, union rates reach roughly 90 to 98 percent, and for non-displaced or minimally displaced proximal fractures, good outcomes occur in 80 to 90 percent of patients.¹ The recovery process, though, is not always simple or fast, and the results depend heavily on fracture location, how displaced the bone fragments are, and how faithfully you follow a rehabilitation program.

Why the Humerus Often Heals on Its Own

Bone has an impressive built-in repair system. When a fracture is managed without rigid metal fixation, the bone heals through what is called secondary healing. A small amount of motion at the fracture site triggers the body to form a soft callus, a mass of cartilage and early bone tissue that bridges the gap. Over weeks, that callus gradually hardens into woven bone and is eventually remodeled into mature, structured bone by the coordinated work of bone-building and bone-resorbing cells. This remodeling phase can continue for months or even years.² The humerus is well suited to this process because, unlike a leg bone, it does not bear your body weight. The surrounding muscles act as a kind of natural splint, and gravity pulling on the hanging arm actually helps keep the fragments aligned.

Functional bracing took advantage of these principles and became the standard approach for most midshaft humerus fractures after it was pioneered in the late 1970s. Rather than a rigid cast that locks the shoulder and elbow, a functional brace is a clamshell sleeve around the upper arm that allows those joints to move while compressing the soft tissue enough to stabilize the bone. In the largest reported series, which followed over 900 patients, 98 percent of closed fractures and 94 percent of open fractures healed with bracing alone.

Which Fractures Are Good Candidates for Non-Surgical Treatment

The humerus is a long bone, and fractures at different locations along it behave differently. Broadly, surgeons categorize them as proximal (near the shoulder), shaft or diaphyseal (the long middle section), and distal (near the elbow). Non-surgical management has its best track record for shaft fractures and for proximal fractures that are non-displaced or only mildly shifted out of position.

For shaft fractures, the alignment does not have to be perfect. Decades of clinical experience suggest the bone can heal in a functional position even with up to about 20 degrees of front-to-back angulation, 30 degrees of side-to-side angulation, 3 centimeters of shortening, and 15 degrees of rotational mismatch.³ Those numbers sound alarming on paper, but in practice they translate to a healed arm that works well. One study found that residual angulation up to about 18 degrees in the front-to-back plane and up to 27 degrees in the side-to-side plane had no correlation with patients’ self-reported disability or satisfaction scores.⁴

Proximal fractures are a more nuanced decision. When the fragments are minimally displaced, conservative treatment leads to good outcomes in the vast majority of patients. Surgery becomes a stronger consideration when the humeral head is severely compromised by dislocation, deep impaction, or a split; when the shaft and head fragments are grossly unstable relative to each other; or when displaced tuberosities are expected to cause a painful malunion.⁵

Fracture location along the shaft also matters for healing success. In one series of 49 patients treated with functional bracing, fractures in the upper third of the shaft had a 29 percent failure-to-heal rate, compared with only 4 percent for middle-third fractures and zero for distal-third fractures.

What to Expect During Recovery

The early days after a humerus fracture are the hardest. You will typically start in a sling or a coaptation splint for the first week or two before transitioning to a functional brace. Pain is usually most intense in the first two weeks and improves substantially by weeks four to six, though soreness with certain movements can linger for months. Sleeping is often the biggest practical challenge because lying flat puts pressure on the fracture site. Many people find that sleeping semi-upright in a recliner or propped up with pillows is the only comfortable option for the first few weeks.

The brace itself is usually worn for about six to twelve weeks, depending on fracture stability and how quickly callus forms on follow-up X-rays. During this time, you can generally use your hand and forearm for light tasks, and the brace allows elbow bending and straightening. Overhead reaching and lifting anything heavier than a coffee cup are off the table until the fracture is solidly united. Most people with desk-type jobs can return to work within a few weeks using the uninjured arm, but physically demanding work typically requires three to four months or more.

Rehabilitation and Getting Your Shoulder Moving Again

Stiffness is the main enemy of a good long-term result. The shoulder joint does not tolerate immobility well, and the longer it stays locked down, the harder it is to get range of motion back. Most rehab protocols begin with gentle pendulum exercises, where you lean forward and let the arm swing passively in small circles under the pull of gravity, before progressing to active-assisted stretching and eventually strengthening.

One question patients often ask is how soon to start moving. A randomized trial of non-surgically treated proximal humerus fractures compared starting pendulum exercises within days of injury versus waiting a full month. At six months, both groups had the same forward flexion, the same disability scores, and the same pain levels.⁶ That finding is reassuring if early movement feels too painful or anxiety-provoking: waiting a few weeks to start exercises does not seem to doom your shoulder to permanent stiffness. Still, most surgeons encourage beginning gentle motion as soon as it is tolerable, because while outcomes equalize by six months, earlier movers tend to feel better sooner.

A systematic review of immobilization periods after conservatively managed proximal humerus fractures found wide variation in when clinicians introduced motion, but the general pattern was to start with passive and pendular exercises first and layer on more demanding exercises over time.⁷ A typical timeline looks something like this:

Weeks 0–3: Sling or brace with pendulum exercises and elbow, wrist, and hand motion to prevent stiffness below the fracture.
Weeks 3–6: Active-assisted shoulder range of motion, usually with the help of a physical therapist or a pulley system at home.
Weeks 6–12: Active shoulder motion and light resistance, progressing as X-rays confirm healing.
Months 3–6: Progressive strengthening, return to heavier functional tasks, and sport-specific training if applicable.

Full recovery of shoulder strength and range of motion typically takes six months to a year. Some patients notice continued improvement in endurance and comfort even beyond that. The biggest predictor of your long-term outcome is consistent adherence to the exercise program, not the specific protocol you follow.

Radial Nerve Palsy

The radial nerve wraps around the back of the humerus in a groove along the shaft, and fractures in that area can stretch, bruise, or occasionally trap the nerve. This shows up as a wrist drop, where you cannot extend your wrist or fingers upward, along with numbness on the back of the hand. A systematic review of over 1,700 patients found that about 10 percent of people with closed humeral shaft fractures develop radial nerve palsy, and the range in the literature is roughly 7 to 17 percent.⁸

The good news is that the vast majority of these palsies resolve on their own. The same review found a 91 percent spontaneous recovery rate with non-operative management, and another systematic review reported about 71 percent recovering within six months.⁹ Because most cases resolve, the standard approach is to watch and wait rather than rush to surgical exploration. If the nerve shows no signs of recovery after about three to four months, further investigation such as nerve conduction studies or imaging becomes appropriate. In rare cases, the nerve is trapped between fracture fragments and requires surgical release, but this is the exception.

While you wait for the nerve to recover, a wrist splint that keeps your hand in a functional position makes daily tasks much easier. Occupational therapy can also help you develop compensatory strategies so you can continue working and managing self-care.

Nonunion and What Raises the Risk

The main drawback of non-surgical treatment is a higher chance that the fracture simply does not heal, a situation called nonunion. A meta-analysis pooling data from randomized trials and observational studies found a nonunion rate of about 15 percent in conservatively treated humeral shaft fractures versus about 6 percent in those treated surgically.¹⁰ A smaller randomized trial reported an 18 percent nonunion rate with bracing versus 6 percent with surgery, though the difference did not reach statistical significance in that study’s limited sample.¹¹

If a nonunion develops, it usually becomes apparent by about four to six months when X-rays show no callus progression and the patient continues to have pain and instability at the fracture site. Surgery at that point becomes necessary, and outcomes of nonunion surgery are generally good, though the recovery clock effectively resets.

Several factors appear to increase nonunion risk substantially. One study of over 500 non-operatively managed humeral fractures found that preinjury use of NSAIDs (ibuprofen, naproxen, and similar drugs) was strongly associated with nonunion, alongside pre-existing shoulder arthritis.¹² Smoking is another well-documented risk factor. An analysis of proximal humerus fractures found that when imaging measurements showed the head fragment was severely tilted and displaced, the nonunion rate climbed to over 80 percent, and smoking compounded that risk in both low- and high-risk groups.¹³ If you smoke and are considering non-surgical management of a humerus fracture, your doctor will likely have a very frank conversation about the added risk.

How Non-Surgical Treatment Compares to Surgery Overall

Despite the higher nonunion rate, conservative management holds its own surprisingly well in head-to-head comparisons with surgery. That same meta-analysis that flagged the nonunion difference found no meaningful difference in time to union or in disability scores between the two groups.¹⁴ For proximal humerus fractures, a separate systematic review and meta-analysis comparing surgery to non-operative treatment for displaced fractures found no differences in clinical outcomes, shoulder abduction, forward flexion, or external rotation.¹⁵

Surgery has its own complications. Hardware irritation, infection, nerve injury during the procedure, and the need for hardware removal are all possibilities that do not exist with a brace. The reintervention rate for conservatively treated patients was higher in pooled data (about 14 percent versus 9 percent for surgery), but that gap was driven almost entirely by the nonunion conversions.¹⁶ Permanent radial nerve palsy rates were equal regardless of treatment approach.

In practical terms, for the roughly 85 percent of conservatively treated patients whose fracture heals, the end result is functionally equivalent to surgery without the risks and cost of an operation. The catch is that there is a one-in-six or so chance of needing surgery anyway down the line. That trade-off is at the center of every shared decision between patient and surgeon.

The Cost Question

Cost-effectiveness analyses on humerus fracture management have produced mixed results depending on what costs are counted. A U.S.-based study concluded that functional bracing was the most cost-effective strategy for shaft fractures from a pure healthcare spending perspective because bracing is vastly cheaper than an operating room, implants, and a hospital stay.¹⁷ When societal costs are factored in, including lost income while in a brace for weeks longer than a surgically fixed arm would require, the calculus begins to shift. A Dutch prospective study found that total costs per patient were higher in the surgery group but so were quality-adjusted outcomes, resulting in a cost of roughly €112,000 per quality-adjusted life year gained, which is above most European willingness-to-pay thresholds.¹⁸

A Danish analysis reached a different conclusion, finding that surgery was actually more cost-effective when lost wages were included as a cost component. Under their model, operative management was both more effective and less costly to the patient at six months and one year.¹⁹ The disagreement between these studies likely comes down to differences in healthcare pricing, wage structures, and how surgical success and complication costs were modeled. What they agree on is that the functional difference between the two approaches is small. The financial calculation depends more on your individual circumstances, whether you can afford time off work, what your insurance covers, and how you weigh the risks of surgery against the risks of a prolonged brace.

Children and the Elderly

Two groups at opposite ends of the age spectrum both lean heavily toward non-surgical management, but for different reasons.

In children, the proximal humerus has a growth plate that contributes about 80 percent of the bone’s total length growth. This means the remodeling potential is enormous. Fractures that look dramatically displaced on an X-ray in a child can straighten themselves out over months as the bone continues to grow, producing excellent outcomes without surgery.²⁰ The younger the child, the more displacement is acceptable because there are more years of growth remaining to correct it. Adolescents near skeletal maturity have less remodeling capacity and are treated more like adults.

In older adults, humerus fractures, especially proximal ones, are extremely common and are often linked to osteoporosis. Non-surgical management is frequently preferred because these patients have higher surgical risks from anesthesia and comorbidities, and because weakened bone does not hold metal implants as reliably. A large registry-based study of older individuals with proximal humerus fractures found that surgery was associated with somewhat longer overall survival and fewer adverse events, but also with significantly more surgery-related complications.²¹ The survival benefit of surgery in that data may partly reflect selection bias: healthier older patients are more likely to be offered surgery in the first place. A separate systematic review documented a 30-day mortality risk of about 2 percent after a proximal humerus fracture in elderly patients, a reminder that this is not a trivial injury in this population regardless of how it is treated.²²

Monitoring Healing and When to Worry

Follow-up appointments for a non-surgically managed humerus fracture typically happen every two to three weeks in the early phase, with X-rays to check alignment and look for callus formation. By about six weeks, visible callus on X-ray is a reassuring sign that healing is on track. An assessment of minimally displaced proximal humerus fractures treated conservatively found that all fractures healed without nonunion, and 88 percent showed good or excellent bony alignment at follow-up.²³

X-rays have limitations, though. Callus can be hard to see early on, and the decision about whether a fracture is “healed enough” to discontinue the brace or start loading the arm is often partly a clinical judgment call based on how the fracture site feels on examination. There is growing interest in using ultrasound as a radiation-free way to detect callus formation earlier than X-rays can. A study protocol is currently underway to test whether ultrasound can reliably pick up early callus in proximal humerus fractures and predict union status before it is visible on plain films.²⁴ If validated, this could reduce the number of X-rays needed during follow-up and give patients earlier reassurance about healing progress.

Bone Stimulation Devices

You may come across advertisements for bone growth stimulators, devices that deliver low-intensity pulsed ultrasound or electromagnetic fields to the fracture site to speed healing. A systematic review and meta-analysis of randomized controlled trials found that these devices did appear to shorten the time to union in non-operatively treated fractures and upper limb fractures specifically, though the results across all fracture types were mixed.²⁵ Insurance coverage for these devices is inconsistent, and they add another layer of daily compliance to an already demanding recovery. For an uncomplicated humerus fracture that is healing on schedule, most surgeons do not recommend them. They are more commonly discussed when healing is delayed or when risk factors for nonunion are present.

The NSAID Dilemma

One of the more underappreciated risks of non-surgical humerus fracture management is pain medication choice. It is natural to reach for ibuprofen or naproxen after a fracture because they are effective painkillers and reduce swelling. But the study that identified NSAID use as a strong independent predictor of nonunion should give pause.²⁶ The anti-inflammatory action that makes NSAIDs good at reducing pain also appears to interfere with the inflammatory cascade that initiates bone healing. This does not mean a single dose of ibuprofen will doom your fracture. The concern is with regular, sustained use during the critical early weeks of healing. Most orthopedic surgeons now advise acetaminophen as the first-line over-the-counter painkiller after a fracture and reserve NSAIDs for patients whose pain is otherwise unmanageable, or they limit NSAID use to after the initial healing window has passed.