Humerus Fracture

A humerus fracture is a break in your upper arm bone (humerus), the long bone that runs from your shoulder to your elbow. These fractures can happen in different places along the bone and vary in severity, often resulting from falls or direct impacts. Proper medical care is essential for healing and regaining arm function.

What is Humerus Fracture?

A humerus fracture is a break in the humerus, which is the long bone in your upper arm, extending from your shoulder to your elbow. These fractures are common and can occur in different parts of the bone, ranging from a small crack to a complete break, sometimes with bone pieces out of alignment.

Your humerus is a vital bone that connects your shoulder blade (scapula) to your forearm bones (radius and ulna). Fractures can occur at three main locations along this bone. A proximal humerus fracture happens near your shoulder joint. These are often seen in older adults, usually after a fall onto an outstretched arm (MedlinePlus, Mayo Clinic). A mid-shaft humerus fracture occurs in the middle part of the bone. This type of fracture often results from a direct blow to the arm or a twisting injury. A specific concern with mid-shaft fractures is potential injury to the radial nerve, which runs close to the bone in this area (MedlinePlus, Mayo Clinic). A distal humerus fracture is located near your elbow joint. These fractures are less common than proximal or mid-shaft breaks. They typically result from high-energy trauma and can be more complex because they involve the elbow joint itself (MedlinePlus). The type and location of the fracture help doctors decide on the best treatment.

Symptoms

If you have a humerus fracture, you will likely experience severe pain, swelling, and bruising in your upper arm. You may also notice a deformity, where your arm looks out of place, and find it difficult or impossible to move your arm.

The pain from a humerus fracture is usually immediate and intense, worsening with any attempt to move your arm or shoulder. The area around the break will often become swollen and tender to the touch. You might also see significant bruising, which can spread down your arm and even to your hand over time (MedlinePlus, Mayo Clinic). In some cases, the fracture can cause your arm to look visibly bent or twisted, which is called a deformity. You might also hear or feel a grinding sensation, known as crepitus, when you try to move your arm. It's common to be unable to lift or rotate your arm due to the pain and instability caused by the broken bone (MedlinePlus, Mayo Clinic).

Causes & risk factors

Humerus fractures are typically caused by direct trauma, such as falls, sports injuries, or car accidents. Certain risk factors, like weakened bones from conditions such as osteoporosis, can make you more susceptible to these breaks.

The most common cause of a humerus fracture is a fall, especially falling onto an outstretched arm (MedlinePlus, Mayo Clinic). Direct blows to the upper arm, such as during contact sports or a car accident, can also lead to a fracture. High-energy impacts are often responsible for more severe or complex breaks. Several factors can increase your risk of breaking your humerus. Osteoporosis, a condition that causes bones to become weak and brittle, is a significant risk factor, particularly for proximal humerus fractures in older adults (MedlinePlus, Mayo Clinic). Bones weakened by conditions like bone tumors can also break more easily, sometimes with minimal trauma; these are called pathologic fractures (MedlinePlus, Mayo Clinic).

How it's diagnosed

Doctors diagnose a humerus fracture through a physical examination of your arm and shoulder, followed by imaging tests. X-rays are the primary tool used to confirm the fracture, show its exact location, and determine how severe it is.

During a physical exam, your doctor will carefully check your arm for swelling, bruising, and any visible deformity. They will also assess your ability to move your arm and check for signs of nerve or blood vessel damage, such as numbness, tingling, or changes in circulation in your hand (MedlinePlus, Mayo Clinic). After the physical exam, X-rays are taken to get clear images of your humerus. These images confirm whether a fracture is present, where it is located, and if the bone pieces are still aligned or have shifted (displaced). In some cases, if more detailed images are needed—especially for fractures near a joint or if there's concern about other injuries—your doctor might order a computed tomography (CT) scan. A CT scan provides cross-sectional views that can reveal more complex fracture patterns (MedlinePlus, Mayo Clinic). Rarely, a magnetic resonance imaging (MRI) scan might be used to evaluate soft tissue injuries, though it's less common for initial fracture diagnosis.

Treatment options

Treatment for a humerus fracture depends on the fracture type, severity, and your overall health. Options range from non-surgical methods, like slings or braces, to surgical procedures involving plates, screws, or rods to stabilize the bone.

Many humerus fractures, especially those that are stable and not significantly displaced (meaning the bone pieces are still mostly in alignment), can be treated without surgery. Non-surgical treatment typically involves immobilizing your arm in a sling, brace, or cast to hold the bone in place while it heals. Your doctor will also prescribe pain medication to manage discomfort. Regular follow-up X-rays will be taken to ensure the bone is healing correctly (MedlinePlus, Mayo Clinic). Surgery is usually recommended for fractures that are unstable, significantly displaced, or involve an open wound (open fractures). Surgical procedures may involve using metal plates and screws to hold the bone fragments together, or inserting a rod (intramedullary nail) down the center of the bone. In severe cases of proximal humerus fractures, especially in older adults, a shoulder joint replacement might be considered (MedlinePlus, Mayo Clinic, Cochrane Library). The decision between non-surgical and surgical treatment is made by your doctor based on many factors, including the specific type of fracture (proximal, mid-shaft, or distal), its complexity, your age, activity level, and other health conditions. For example, evidence suggests that for some proximal humerus fractures in older adults, non-surgical treatment with a sling can have similar outcomes to surgery, with fewer risks of complications (Cochrane Library). Regardless of the treatment chosen, physical therapy is a critical part of recovery.

Recovery & outlook

Recovery from a humerus fracture typically takes several months, with the bone healing over weeks and full function returning gradually through physical therapy. The outlook is generally good, but some people may experience long-term stiffness or reduced range of motion.

The initial healing of a humerus fracture can take several weeks, but full recovery often extends over 4 to 6 months or even longer, depending on the fracture's severity and location (MedlinePlus, Mayo Clinic). During this time, your doctor will monitor your healing with X-rays. Once the initial healing allows, physical therapy is crucial. A physical therapist will guide you through exercises to restore strength, flexibility, and range of motion in your arm and shoulder. Potential complications can occur. Nerve damage, particularly to the radial nerve with mid-shaft fractures, can lead to weakness or numbness in the hand and wrist (MedlinePlus, Mayo Clinic). Other complications include the bone not healing properly (nonunion) or healing in an incorrect position (malunion), which might require further treatment. Stiffness in the shoulder or elbow joint is also common, especially if the arm was immobilized for a long time (MedlinePlus, Mayo Clinic). Despite these potential issues, most people achieve a good recovery with appropriate treatment and consistent rehabilitation. While some individuals may experience residual stiffness or a slight reduction in their arm's range of motion, many can return to their previous activities. Your commitment to physical therapy significantly impacts your long-term outcome.

When to see a doctor

You should seek immediate medical attention if you suspect you have a humerus fracture. This includes experiencing severe pain, an obvious deformity in your arm, or an inability to move it after an injury.

Do not delay seeking medical care if you have experienced an injury to your upper arm and notice any of the key symptoms. These include intense pain that doesn't improve, visible bending or twisting of your arm, or if you cannot lift or move your arm at all (MedlinePlus, Mayo Clinic). It is also critical to see a doctor right away if you experience numbness, tingling, or weakness in your hand or fingers, as these could be signs of nerve damage. Changes in the color or temperature of your hand, such as it becoming pale or cold, could indicate a problem with blood flow and require urgent evaluation (Mayo Clinic). Prompt medical attention helps ensure proper diagnosis and treatment, which can prevent further complications and improve your recovery.

Frequently asked questions

How long does a humerus fracture take to heal?

The initial healing of a humerus fracture typically takes several weeks, but full recovery, including regaining strength and movement, often takes 4 to 6 months or even longer. The exact time depends on the fracture's severity, location, and your adherence to physical therapy (MedlinePlus, Mayo Clinic).

Will I need surgery for a humerus fracture?

Not all humerus fractures require surgery. Many stable fractures can heal with non-surgical treatments like a sling or brace. Surgery is usually considered for unstable, displaced, or open fractures, or when non-surgical methods are not effective (MedlinePlus, Mayo Clinic, Cochrane Library).

What kind of physical therapy will I need after a humerus fracture?

Physical therapy is crucial for recovery. It typically involves exercises to restore your arm's range of motion, strengthen the muscles around your shoulder and elbow, and improve overall function. Your physical therapist will create a personalized plan based on your specific fracture and healing progress (MedlinePlus, Mayo Clinic).

Can a humerus fracture cause nerve damage?

Yes, a humerus fracture can sometimes cause nerve damage, especially mid-shaft fractures, which can affect the radial nerve. Symptoms of nerve damage might include numbness, tingling, or weakness in your hand or wrist. Your doctor will check for this during diagnosis and monitor it during recovery (MedlinePlus, Mayo Clinic).

What are the long-term effects of a humerus fracture?

Most people recover well from a humerus fracture. However, some long-term effects can include residual stiffness in the shoulder or elbow, a slight reduction in arm range of motion, or, less commonly, chronic pain. Consistent physical therapy helps minimize these effects (MedlinePlus, Mayo Clinic).

How can I prevent a humerus fracture?

Preventing humerus fractures often involves reducing your risk of falls, especially if you are an older adult or have osteoporosis. This includes improving home safety, wearing appropriate footwear, and maintaining bone health through diet and exercise. Using proper protective gear during sports can also help (Mayo Clinic).

Sources

• MedlinePlus — Humerus Fracture
• Mayo Clinic — Humerus Fracture
• Cochrane Library — Humerus Fracture