Signs a Broken Bone Is Not Healing Properly

Key Takeaways

• Most fractures heal well, but some do not, and recognizing the signs of poor healing early helps prevent long-term complications.
• A delayed union is a fracture that is taking longer than expected to heal, while a nonunion is one that has stopped healing altogether.
• Warning signs include ongoing pain at the fracture site, persistent swelling, instability, and a lack of progress on follow-up X-rays.
• Smoking, poor nutrition, certain medications, diabetes, and weight-bearing too soon are some of the most common factors that slow bone healing.
• Early evaluation by an orthopedic specialist gives you the best chance of getting a stalled fracture back on track without surgery.
• Dr. Kevin McCarthy in Hollywood, FL is an experienced provider of fracture care near you, offering thorough evaluation and personalized treatment for delayed and nonunion fractures. Request an appointment today.

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How Bones Normally Heal After a Fracture

Bone healing is a remarkable process. Most fractures move through four overlapping phases that, together, restore the bone to nearly its original strength.

• Inflammation phase: In the first days after a fracture, blood vessels at the injury site form a clot called a hematoma. This delivers cells and nutrients needed for healing.
• Soft callus phase: Over the next few weeks, the body forms a soft tissue framework around the break.
• Hard callus phase: Within about 6 to 12 weeks, that soft callus is replaced with harder, bonelike tissue.
• Remodeling phase: Over months and sometimes years, the new bone is remodeled into its original shape and strength.

Many simple fractures feel substantially better within 6 to 8 weeks, even if complete remodeling takes longer. When this timeline stalls or stops, something is interfering with the body's natural process.

For patients in Hollywood, FL who are worried about a fracture that isn't healing as expected, Dr. Kevin McCarthy offers expert fracture care and personalized treatment plans.

Delayed Union vs. Nonunion: What's the Difference?

The two terms most often used for fractures that are not healing well are 'delayed union' and 'nonunion.' They mean different things and call for different responses.

Both delayed unions and nonunions are usually detected when expected milestones aren't met on physical exam, imaging, or symptoms. According to a population-based analysis published in Acta Orthopaedica, the overall risk of nonunion per fracture is about 1.9%, though for certain fractures in specific age groups, it can rise to 9%. While that overall rate is low, individual fractures can have a significantly higher risk depending on location, severity, and patient factors.

Warning Signs of Delayed Bone Healing or Nonunion

Most patients can sense when a fracture isn't healing the way it should, even before a doctor confirms it on imaging. Watch for these warning signs.

Ongoing Pain at the Fracture Site

Pain that does not gradually fade over weeks or comes back after starting to improve is one of the most common signs of delayed healing. Pain at the original fracture site months after the injury, especially with weight bearing or use, deserves evaluation.

Persistent Swelling or Warmth

Swelling, warmth, or redness that lingers well past the early healing phase can point to ongoing inflammation, irritation, or, in some cases, infection.

A Feeling of Instability or Movement

A healed bone should feel stable. If you can feel motion at the fracture site, or the limb feels weak or wobbly with use, the bone may not have knit back together.

Trouble Returning to Normal Activity

If you're still unable to walk, lift, or use the affected limb the way your doctor predicted you would by a given milestone, that's worth a conversation.

No Progress on Follow-Up X-Rays

The most reliable sign of nonunion is imaging that shows little or no callus formation or shows the same gap between bones over time. Your specialist will compare a series of X-rays to see whether the fracture is progressing.

Visible Deformity or Shortening

A change in the alignment, length, or shape of the limb can indicate that the bone is not healing in the right position.

A Wound or Drainage at the Site

In surgically treated fractures, any new drainage, opening, or discharge near the incision is a concerning sign that calls for urgent evaluation.

Why Some Fractures Heal More Slowly Than Others

Not every fracture heals at the same pace. A range of factors influences how quickly and completely a bone repairs itself.

Location and Type of Fracture

Some bones are inherently slower to heal. Fractures with limited blood supply, like certain wrist, foot, or shin bones, are more likely to develop nonunion. Severe fractures with multiple fragments (comminuted fractures) or open fractures that break the skin are also at higher risk.

Severity and Displacement

A clean, well-aligned crack tends to heal more easily than a fracture where bones have shifted significantly out of position.

Age and Bone Health

Older adults and patients with osteoporosis often heal more slowly. Bone density and overall bone quality affect the body's ability to rebuild.

Infection

Bone or wound infection can stall healing entirely and may require specific treatment before the fracture can mend.

• Medical Conditions
• Certain conditions are known to slow bone healing, including:
• Diabetes
• Vascular disease
• Rheumatoid arthritis
• Kidney disease
• Vitamin D or calcium deficiency

Movement at the Fracture Site

A fracture needs stillness to heal. Weight-bearing too soon, removing a cast or boot prematurely, or skipping immobilization instructions can disrupt the process.

Conditions and Habits That Affect Bone Recovery

Some risk factors are within a patient's control, and addressing them can meaningfully improve the chances of a full recovery.

• Smoking and nicotine use. Nicotine narrows blood vessels and slows the delivery of oxygen and nutrients to healing bone. This is one of the most significant modifiable risk factors for nonunion.
• Heavy alcohol use. Alcohol can interfere with bone-forming cells and overall nutrition.
• Poor nutrition. Inadequate protein, calcium, and vitamin D leave the body without enough raw materials for healing.
• NSAID use. Long-term anti-inflammatory medications may slow healing in some fractures. Always discuss medication choices with your specialist.
• Steroids. Long-term corticosteroid use can reduce bone strength and healing capacity.
• Lack of follow-up. Skipping appointments or imaging means problems are caught later, when they are harder to treat.

When to Return to an Orthopedic Specialist

Even if your fracture care has been going smoothly, schedule a return visit if you experience any of the following:

• Pain that has not improved over several weeks, or worsens after improving
• Swelling, warmth, or redness around the fracture site
• A sense of motion, clicking, or instability at the original break
• An obvious change in the shape or alignment of the limb
• Difficulty returning to weight-bearing on schedule
• Persistent numbness, tingling, or weakness
• Drainage or a wound that won't close after surgical repair
• Concerns about infection, including fever or chills

It's always reasonable to return for an evaluation if something feels off. Early detection of a delayed union or nonunion gives you more treatment options and a better chance of avoiding surgery.

Possible Treatment Options for Delayed Healing

When a fracture is not healing as it should, several treatment paths are available. The right choice depends on the location, the cause of delayed healing, your overall health, and how long the issue has been going on.

Non-Surgical Treatments

• Extended immobilization with a cast, brace, or boot to give the bone more time to heal undisturbed
• Activity modification and weight-bearing changes based on imaging
• Nutritional support, including calcium, vitamin D, and protein adjustments
• Smoking cessation support, since this alone can significantly improve healing
• Treatment of underlying conditions like uncontrolled diabetes or vitamin deficiency
• Bone stimulators, devices that use ultrasound or low-level electrical signals to encourage healing in certain cases

Surgical Treatments

When non-surgical options have not worked, surgery can often restart healing. Common procedures include:

• Internal fixation with plates, screws, or rods to stabilize the bone
• Bone grafting, where bone material is added to support new growth
• Revision surgery to correct alignment or remove failed hardware
• Infection treatment if infection is suspected as a cause

A specialist evaluation is the only way to know which option fits your specific case.

How Dr. McCarthy Provides Personalized Fracture Care

Dr. Kevin McCarthy is a board-certified orthopedic surgeon in Hollywood, FL who provides comprehensive fracture care for adults across the Fort Lauderdale area. Patients value Dr. McCarthy's calm, honest, and thorough approach. Whether you're checking in on a fracture that doesn't feel right or returning for a second opinion on slow healing, he takes the time to evaluate the situation carefully and explain your options clearly.

Dr. McCarthy treats simple fractures, compound fractures, stress fractures, and comminuted fractures, with both non-surgical and surgical options as appropriate. When physical therapy supports recovery, those services are integrated through the practice's non-operative treatment program.

Get a Slow-Healing Fracture Back on Track

A fracture that is not healing properly is not something to wait out. The earlier the problem is identified, the more options you have for getting bone healing back on track without major surgery.

Request an appointment with Dr. Kevin McCarthy in Hollywood, FL today to get a clear evaluation and a personalized fracture care plan that supports complete recovery.

Frequently Asked Questions