Most broken sternums take roughly ten to twelve weeks to heal, though lingering chest pain and stiffness can stretch well beyond that window. One study tracking patients after discharge found that chest pain persisted for an average of about eleven weeks, and people over 50 experienced symptoms for significantly longer.1PubMed. Long-term morbidity in patients suffering a sternal fracture following discharge from the A and E department The vast majority of sternal fractures heal without surgery, but the recovery period involves more than just waiting for bone to knit. Pain control, screening for hidden injuries, and gradually returning to normal activity all shape how the weeks actually feel.
What Causes a Broken Sternum
The sternum, or breastbone, is the flat bone running down the center of your chest that connects the ribs via cartilage. It sits right over the heart and major blood vessels, which is why doctors pay close attention when it breaks. Sternal fractures are mostly caused by sudden deceleration injuries and blunt force to the front of the chest, with car crashes (particularly seatbelt impacts) being the leading cause.2PubMed Central. Sternal fractures and their management Falls, sports collisions, and assaults account for many of the remaining cases. In older adults with reduced bone density, even relatively minor trauma can fracture the sternum. One case report described an 86-year-old woman who fractured her sternum simply by falling at home and landing on her own fist.3PubMed Central. Isolated sternal fracture after low-energy trauma in a geriatric patient: a case report Additionally, congenital variations such as a sternal foramen, a small hole in the bone that some people are born with, can complicate the picture if a fracture occurs nearby.4Journal of Surgical Case Reports. Incidental sternal foramen discovered during the evaluation of a traumatic fracture: a case report
How Sternal Fractures Are Diagnosed
Detecting a sternal fracture is not always straightforward. A standard chest X-ray, taken from front to back, often misses it because the sternum overlaps with the spine on that view. A lateral X-ray is better, but even so, conventional radiography catches sternal fractures in only a fraction of cases. In one study of 50 patients with confirmed sternal fractures, standard radiography detected only 12, while ultrasound found 31.5PubMed. Diagnostic values of sonography for assessment of sternal fractures compared with conventional radiography and bone scans
CT scanning is generally considered the gold standard for evaluating chest trauma, and sagittal CT images are highly sensitive for sternal fractures. But even CT can occasionally miss them. One case report documented a sternal fracture in an elderly patient that CT failed to detect but ultrasound clearly identified.6PubMed Central. Minor Trauma, Major Discovery: The Ultrasound Identification of a Sternal Fracture Missed by Computed Tomography in an Older Patient Presenting With Acute Chest Pain Ultrasound has the added advantages of being portable, radiation-free, and quick, which makes it especially appealing in emergency settings and for children. Two pediatric sternal fractures were confirmed by ultrasound and managed without surgery, illustrating how useful bedside imaging can be when dealing with younger patients.7PubMed Central. Sternal Fracture in Children: Diagnosis by Ultrasonography
The practical takeaway is that if you have significant chest pain after trauma and an initial scan comes back negative, a sternal fracture has not necessarily been ruled out. Asking about ultrasound or a repeat scan with different imaging angles is reasonable.
Why Pain Control Matters More Than You Might Expect
A broken sternum hurts with every breath, every cough, and every attempt to roll over in bed. That is not just unpleasant; it is medically relevant. When pain prevents you from breathing deeply or coughing effectively, mucus builds up in the lungs, and the risk of pneumonia and other respiratory complications climbs. This is the central problem in sternal fracture recovery and the main reason doctors focus so much on keeping pain under control.
According to a systematic review of literature spanning nearly three decades, more than 95% of sternal fracture patients are treated conservatively with bed rest, oral pain medication, and sometimes a supportive brace or vest.8Kosin Medical Journal. Treatment of Isolated Sternal Fracture with Ultrasound-Guided Paravertebral Nerve Block: a Case Report and Literature Review Over-the-counter anti-inflammatory drugs and prescription painkillers form the backbone of treatment. In cases where oral medication is not enough, nerve block techniques can be used. An ultrasound-guided parasternal block, where a local anesthetic is injected near the nerves supplying the sternum, can dramatically reduce pain and improve the ability to breathe deeply.9PubMed Central. Ultrasound-Guided Parasternal Block Allows Optimal Pain Relief and Ventilation Improvement After a Sternal Fracture
The connection between adequate pain relief and avoiding lung complications is well established in post-sternotomy care as well. In cardiac surgery patients whose sternums are deliberately cut and wired back together, timely pain control enables earlier deep breathing, earlier mobilization, and faster discharge from intensive care.10PubMed Central. Pain Relief Following Sternotomy in Conventional Cardiac Surgery: A Review of Non Neuraxial Regional Nerve Blocks The same principle applies to traumatic sternal fractures. If you can breathe deeply and move around, the lungs stay clear and the body heals faster.
Screening for Hidden Injuries
Because the sternum sits directly over the heart, any fracture from a significant impact raises the question of whether the heart was bruised in the process. Myocardial contusion, essentially a cardiac bruise, can cause abnormal heart rhythms and, in rare cases, more dangerous complications. Most guidelines recommend an electrocardiogram (ECG) on arrival and either a follow-up ECG or continuous heart monitoring for about six hours after the injury, along with a blood test for troponin (a protein released when heart muscle is damaged) drawn four to eight hours post-trauma.11PubMed Central. Investigation of myocardial contusion with sternal fracture in the emergency department: multicentre review
The reassuring news is that serious cardiac complications from sternal fractures are uncommon. A study of 350 patients with sternal fractures found that about a third had a suspected cardiac injury on admission, but only two of those patients, fewer than 2%, developed serious complications (both temporary heart rhythm disturbances that resolved). No major structural heart injuries were found on echocardiography.12Injury. Low incidence of severe cardiac complications in traumatic sternal fractures: Rethinking routine rhythm monitoring This has led some researchers to question whether prolonged heart monitoring is necessary for every sternal fracture patient, particularly when the initial ECG and troponin are normal. Still, the standard practice at most hospitals remains a cautious observation window, because the consequences of missing a cardiac injury are severe even if the odds are low.
When Surgery Becomes Necessary
The overwhelming majority of sternal fractures heal on their own. Surgery is reserved for specific situations: fractures where the bone fragments are significantly displaced and overlapping, fractures that fail to heal after months of conservative treatment (nonunion), and cases where breathing is mechanically compromised by the instability of the chest wall.
When fixation is performed, surgeons typically use metal plates screwed into the bone to hold the fragments in alignment. A retrospective study using locking compression plates reported excellent long-term functional results, though about 27% of patients later needed a second operation to remove the hardware.13PubMed. Osteosynthesis of sternal fractures with double locking compression plate fixation: a retrospective cohort study That rate of re-operation is worth knowing if your doctor is discussing surgical options with you.
A large propensity-matched comparison of surgical fixation versus nonoperative management found a complicated tradeoff. Patients who had surgery spent considerably more time in the hospital (a median of 16 days versus 7) and more time in intensive care. However, the surgical group had a significantly lower mortality rate: roughly 3% compared to about 11% in the nonoperative group.14PubMed Central. Comparison of surgical fixation and non-operative management in patients with traumatic sternum fracture This survival benefit likely reflects the fact that surgery is most often used in severe cases where instability is life-threatening, and that stabilizing the chest wall in those patients prevents fatal respiratory decline. For the typical isolated sternal fracture without significant displacement, surgery remains unnecessary.
Age, Bone Density, and the Healing Timeline
Your age matters for both how you break a sternum and how quickly you recover. Younger adults typically fracture the sternum only after high-energy trauma like motor vehicle collisions. Older adults can sustain the same injury from a simple fall, because reduced bone mineral density makes the sternum more fragile. The healing process follows the same general biology regardless of age: an inflammatory phase in the first week or two, gradual formation of a soft callus, then slow mineralization into hard bone over several weeks. But in older patients, each phase tends to take longer.
The study that found an average symptom duration of about eleven weeks also found that patients over 50 had significantly prolonged symptoms compared to their younger counterparts.1PubMed. Long-term morbidity in patients suffering a sternal fracture following discharge from the A and E department That does not mean the bone itself fails to heal; rather, the aching, stiffness, and sensitivity to movement simply take more time to fully resolve. For an otherwise healthy person under 50, feeling substantially better by eight to ten weeks is a reasonable expectation. For someone over 50 or with osteoporosis, planning for twelve weeks or more is more realistic.
There is no reliable way to accelerate sternal bone healing from the outside. Devices marketed as “bone growth stimulators,” which use electrical, electromagnetic, or ultrasound energy, have been developed primarily for long-bone fractures that fail to heal. About 10% of the roughly 7.9 million annual fractures in the United States involve delayed or non-union.15PubMed Central. Bone stimulation for fracture healing: What’s all the fuss? These devices have not been widely studied for sternal fractures specifically, and most clinicians do not recommend them for routine sternal healing.
What Recovery Actually Looks Like Week by Week
The first two weeks are the worst. Deep breathing hurts, laughing or sneezing can be excruciating, and finding a comfortable sleeping position is a project. Many people find that sleeping slightly propped up, in a recliner or with pillows behind their back, reduces the strain on the sternum. You will likely be told to avoid lifting anything heavier than a few pounds and to skip any pushing or pulling motions that engage the chest muscles.
Between weeks three and six, the pain gradually decreases but is still noticeable with exertion. Most people can resume light daily activities like cooking or walking, but anything that involves upper-body strain, from carrying groceries to vacuuming, tends to flare things up. Driving is another common concern. The motion of turning the steering wheel and the seatbelt pressing against the sternum make driving uncomfortable and potentially unsafe early in recovery. Guidelines after median sternotomy (a surgical sternal cut) typically recommend avoiding driving for four to six weeks, and the same general range applies to traumatic fractures, though individual recovery pace varies.16PubMed Central. Altering driving restrictions after median sternotomy
From week six onward, the bone callus is solidifying and the fracture is becoming structurally stable for most people. This is when gradual increases in activity are usually permitted: light resistance exercise, longer walks, and returning to desk work if you have not already. High-impact activities, contact sports, and heavy lifting are generally off the table until the twelve-week mark or beyond, and only after a doctor has confirmed adequate healing.
Long-Term Outcomes and Quality of Life
Most people recover fully from a sternal fracture, but “fully” does not always mean “back to how things were before the injury.” Some patients report persistent discomfort, occasional clicking at the fracture site, and weather-related aching for months after the bone has technically healed. Sternal nonunion, where the bone fragments never fuse, is rare but carries significant morbidity. Pain and sternal clicking are the most common complaints that drive these patients to seek further treatment, and the fix requires surgical debridement and stable fixation of the fragments.17PubMed Central. Late complications of chest wall reconstruction: management of painful sternal nonunion
For patients who do undergo surgical fixation, the long-term quality-of-life picture appears favorable. A survey comparing surgically fixed patients to those managed conservatively found that the surgical group reported significantly better quality of life across most categories, with the only exception being anxiety and depression, where the two groups did not differ.18PubMed. Sternal fixation for traumatic sternal fractures demonstrates better long-term quality of life outcomes than nonoperative management: A survey analysis This does not mean everyone should have surgery. The surgical patients in that study likely had more severe fractures to begin with, which means the comparison is between “bad fracture, surgically repaired” and “bad fracture, left alone.” For the garden-variety sternal fracture that heals uneventfully with rest and pain management, long-term outcomes are good without any intervention.
Thorax Support Vests and Braces
You may encounter recommendations for wearing a chest brace or support vest during recovery. The evidence for these devices comes mainly from the cardiac surgery world, where the sternum is intentionally cut and wired shut, rather than from traumatic fracture studies. Still, the principles translate reasonably well.
A randomized trial of a thorax support vest in post-sternotomy patients found that the vest group had significantly lower pain scores and fewer mechanical sternal complications compared to the group without the vest. The benefit was especially pronounced in patients under 70, heavier patients, and those with chronic lung disease.19PubMed Central. A Randomized Trial to Assess the Contribution of a Novel Thorax Support Vest (Corset) in Preventing Mechanical Complications of Median Sternotomy An earlier trial of a different vest design showed improved sternal stability but no significant difference in pain scores between the vest and non-vest groups, suggesting that not all designs are equally effective.20European Journal of Cardio-Thoracic Surgery. A newly designed thorax support vest prevents sternum instability after median sternotomy
For traumatic sternal fractures, there is no firm consensus on bracing. Some emergency departments send patients home with a recommendation to use a rib belt or chest binder, while others avoid them out of concern that compressive wrapping can restrict breathing and worsen the very respiratory complications you are trying to prevent. If you do use one, the goal is gentle external support that limits the painful motion of the fracture fragments without squeezing the chest so tightly that you cannot take a deep breath.
Sternal Fractures in Children
Sternal fractures are rare in children, partly because the pediatric sternum is more flexible and resilient than the adult version, and partly because children are less likely to experience high-speed deceleration injuries. When they do occur, the fracture is almost always managed without surgery. The two pediatric cases diagnosed by ultrasound and described in the literature both healed with conservative care alone.7PubMed Central. Sternal Fracture in Children: Diagnosis by Ultrasonography Children also tend to heal faster than adults because of their higher rate of bone turnover and robust blood supply to growing bone. A pediatric sternal fracture that would take an adult ten to twelve weeks might resolve in six to eight weeks in a child, though parents should follow up with their pediatrician to confirm healing is on track.
One challenge unique to pediatric sternal fractures is diagnosis. Children are less able to localize their pain precisely, and the more flexible pediatric ribcage can mask fracture signs on physical exam. Ultrasound is particularly valuable here because it avoids radiation exposure and can be performed at the bedside with a cooperative child.
What a Sternal Fracture Does Not Mean
There is a persistent worry among patients that a broken sternum implies life-threatening internal injuries. While it is true that sternal fractures from high-energy impacts can occur alongside rib fractures, spinal injuries, and cardiac contusion, an isolated sternal fracture, one with no other associated injuries, is generally a benign condition from a survival standpoint. The cardiac complication data bear this out: serious heart problems in sternal fracture patients are genuinely rare.12Injury. Low incidence of severe cardiac complications in traumatic sternal fractures: Rethinking routine rhythm monitoring Once associated injuries have been excluded through appropriate imaging and monitoring, the primary challenge is simply getting through the weeks of discomfort while the bone heals.
Another common misconception is that the sternum, once broken, will always be weak or prone to re-fracture. In reality, healed bone callus is typically at least as strong as the original bone, and re-fracture at the same site is uncommon unless there is an underlying bone density problem that has not been addressed. If your sternal fracture occurred after minor trauma, it is worth discussing a bone density evaluation with your doctor, since the fracture may be the first sign of osteoporosis that would otherwise go undetected.