Calcaneal bone marrow oedema has received considerably less research attention than plantar fasciosis, despite being an important cause of persistent heel pain. Most published studies focus on MRI findings rather than individual treatment techniques, and much of the current understanding comes from research into bone stress injuries, plantar heel pain and sports medicine rather than studies examining calcaneal bone marrow oedema as a separate condition.
One of the strongest findings in the literature is that bone marrow oedema is an imaging sign rather than a diagnosis itself. MRI demonstrates increased fluid within the trabecular bone of the calcaneus, indicating that the bone has been subjected to excessive stress. The MRI appearance does not explain why the stress developed, making clinical assessment essential. Treatment should therefore be directed at identifying and correcting the underlying cause rather than simply responding to the MRI finding.
Several MRI studies have demonstrated that bone marrow oedema commonly occurs alongside chronic plantar fasciosis. Patients with longstanding degeneration of the plantar fascia frequently demonstrate oedema within the adjacent calcaneus, suggesting that chronic traction at the plantar fascia insertion contributes to increased stress within the underlying bone. However, not every patient with plantar fasciosis develops bone marrow oedema, indicating that additional factors such as activity level, biomechanics and bone health also influence its development.
Research has consistently shown that MRI is the most sensitive investigation for detecting bone marrow oedema. Ultrasound remains an excellent tool for assessing the plantar fascia and surrounding soft tissues, but it cannot identify increased fluid within the cancellous bone. Plain X-rays are also frequently normal during the early stages of a bone stress reaction, which explains why patients with persistent heel pain may have normal X-rays despite significant symptoms.
The treatment evidence remains less robust than many patients expect. There are relatively few randomised controlled trials examining isolated calcaneal bone marrow oedema, and most recommendations are based on broader evidence relating to bone stress injuries. Reducing mechanical load, gradually returning to activity and correcting the underlying biomechanical or training factors remain the principles most consistently supported by the available research.
There has been growing interest in the use of extracorporeal shockwave therapy for bone marrow oedema in other parts of the body, particularly around the hip and knee. Some studies have reported improvements in pain and MRI appearances following shockwave treatment. However, these findings cannot automatically be applied to calcaneal bone marrow oedema because the heel is subjected to very different mechanical forces, and high-quality studies involving the calcaneus remain limited.
Similarly, there is currently little evidence supporting the routine use of regenerative injections directly into the calcaneus for isolated bone marrow oedema. While regenerative medicine continues to evolve rapidly, current research does not justify recommending these procedures as standard treatment for this condition. Their role may change as higher-quality evidence becomes available.
One consistent finding throughout the literature is the importance of avoiding premature return to sport. Symptoms often improve before the bone has fully recovered, creating a risk that patients may overload the heel too early. Studies of bone stress injuries repeatedly demonstrate that gradual progression of activity reduces the likelihood of recurrence and progression to stress fracture.
Perhaps the most important lesson from the research is that chronic heel pain is frequently multifactorial. Patients may have plantar fasciosis, Baxter's nerve entrapment and calcaneal bone marrow oedema simultaneously. MRI, ultrasound and clinical assessment should therefore be viewed as complementary investigations rather than competing diagnostic tools. The best outcomes are achieved when treatment addresses every clinically significant contributor to the patient's symptoms.
Although further research is needed, the current evidence supports a logical and evidence-based approach: establish an accurate diagnosis, reduce excessive mechanical loading, address contributing biomechanical factors and gradually restore the heel's capacity to tolerate normal activity. This approach remains more strongly supported than relying on any single procedure or intervention.