Why Bone Marrow Lesions May Result in Persistent Joint Pain
Bone marrow lesions are changes within the inner part of bone that are often identified through magnetic resonance imaging (MRI). These changes are commonly associated with joint pain that persists beyond the expected recovery period of minor injuries.
Unlike surface-level injuries involving skin or soft tissue, bone marrow lesions affect the internal structure of bone beneath the cartilage. When symptoms persist or affect daily movement, assessment from a foot and ankle specialist may be considered, particularly when weight-bearing activities such as walking or standing become uncomfortable.
Understanding why these lesions cause persistent pain can help individuals recognise when further evaluation may be necessary for ongoing joint symptoms.
What Are Bone Marrow Lesions?
Changes Within the Bone Structure
Bone marrow lesions refer to areas of altered tissue within the bone, often linked to inflammation, fluid accumulation, or microstructural changes. These changes are not always visible on standard X-rays and are typically detected through MRI scans.
Relationship With Joint Stress
These lesions are frequently found in weight-bearing joints such as the knee or ankle. They may develop in response to repetitive stress, injury, or degenerative changes affecting the joint surface and surrounding structures.
Causes of Bone Marrow Lesions
Previous Joint Injury
A previous injury such as a ligament tear, fracture, or cartilage damage may alter how force is distributed across the joint. This uneven loading may contribute to changes within the bone over time.
Repetitive Mechanical Load
Activities involving repeated impact, such as running, jumping, or prolonged standing, may place ongoing stress on the joint. Over time, this may contribute to internal bone changes.
Degenerative Joint Changes
Bone marrow lesions are sometimes associated with gradual wear of joint cartilage. As cartilage becomes thinner, the underlying bone may experience increased pressure and stress.
Why Bone Marrow Lesions Cause Persistent Pain
Increased Pressure Within the Bone
Bone marrow lesions may be associated with increased internal pressure within the bone. This pressure can contribute to deep, aching pain that is often more noticeable during weight-bearing activities.
Inflammation Within the Bone
Inflammatory changes within the bone tissue may contribute to ongoing discomfort. Unlike superficial injuries, this inflammation occurs beneath the cartilage surface, which may result in longer-lasting symptoms.
Reduced Load Distribution Efficiency
When the joint surface is affected, the normal distribution of forces across the joint may be disrupted. This means certain areas of bone may experience higher stress levels, contributing to persistent pain.
Common Symptoms Associated With Bone Marrow Lesions
Deep Joint Pain
Pain is often described as deep within the joint rather than on the surface. It may be difficult to pinpoint the exact location.
Pain During Weight-Bearing Activities
Discomfort may increase when standing, walking, or climbing stairs, as these activities place load on the affected bone.
Persistent or Recurrent Symptoms
Unlike minor soft tissue injuries that improve quickly, symptoms related to bone marrow lesions may persist over time or recur with activity.
Stiffness and Reduced Function
Some individuals may experience stiffness or difficulty performing normal daily movements due to discomfort.
How Bone Marrow Lesions Are Identified
Clinical Assessment
A healthcare professional may evaluate symptoms, medical history, and physical examination findings to assess joint function and pain patterns.
Imaging Techniques
MRI is commonly used to identify bone marrow lesions, as it provides detailed images of bone and soft tissue structures not visible on X-ray.
Conditions Commonly Associated With Bone Marrow Lesions
Knee Joint Conditions
Bone marrow lesions are often identified in individuals with knee pain, particularly in cases involving cartilage wear or ligament injury.
Ankle Joint Conditions
In the ankle, these lesions may develop following trauma or repetitive stress, especially in active individuals or those with previous injuries.
Sports-Related Injuries
High-impact sports or activities involving sudden direction changes may increase stress on joints, contributing to internal bone changes.
Management Approaches for Bone Marrow Lesions
Reducing Joint Load
Reducing high-impact activities may help decrease stress on the affected bone and support symptom management.
Physiotherapy and Strengthening
Strengthening surrounding muscles may improve joint stability and help distribute load more evenly across the joint.
Supportive Devices
Bracing or orthotic support may be used in some cases to reduce pressure on the affected area during movement.
Medical and Surgical Options
In certain cases, medical or surgical approaches may be considered depending on symptom severity and underlying joint condition.
When to Seek Medical Evaluation
Medical assessment may be considered if joint pain:
- Persists despite rest
- Worsens with weight-bearing activities
- Affects daily movement and function
- Is associated with previous joint injury
Early evaluation may help identify the underlying cause and guide appropriate management strategies.
Bone marrow lesions are internal bone changes that may contribute to persistent joint pain, particularly in weight-bearing joints such as the knee and ankle. These lesions may develop following injury, repetitive stress, or degenerative changes within the joint.
Because symptoms often persist or worsen with activity, early recognition and appropriate assessment may help in understanding the underlying cause of pain and guiding suitable management options for long-term joint function.
