What is a bone bruise?
When you think of a bruise, you probably picture the purple-black mark on the skin after a knock. A bone bruise is a similar concept but occurring inside the bone itself. Bone is not solid — the outer layer (cortical bone) is dense and hard, but the interior (trabecular or cancellous bone) has a honeycomb-like structure of tiny bony struts. When a significant force is applied, these struts can crack (microfractures) and the surrounding tissue swells with fluid (oedema). This is a bone bruise — visible only on MRI, which detects the water content within the bone.
The important distinction is that the outer cortical bone remains intact — there is no true fracture line visible on X-ray. This is why players with bone bruises often receive "good news" from their initial X-ray ("nothing broken"), only to find their symptoms persist for weeks or months. The injury is real and significant — it is simply one that X-rays were not designed to detect.
Where do bone bruises occur in rugby?
| Location | How it happens | How common |
|---|---|---|
| Tibial plateau (top of shin bone at knee) | Direct impact to the knee during tackles, falling onto the knee in rucks, or compressive forces through the joint during landing | Very common — the most frequent bone bruise location in contact sport athletes |
| Femoral condyle (bottom of thigh bone at knee) | Often occurs alongside tibial plateau bruises from the same compressive mechanism. Also seen with ligament injuries (ACL/MCL) | Common — frequently identified on MRI alongside ligament sprains |
| Talus (ankle bone) | Forced dorsiflexion or inversion injuries — the talus impacts against the tibia or fibula during awkward landings or tackle contact | Moderately common — often accompanies ankle sprains |
| Calcaneus (heel bone) | Landing heavily from a lineout, jumping for a high ball, or stepping off a hard surface | Less common but debilitating — deep heel pain with weight bearing |
| Humeral head (shoulder) | Direct impact to the shoulder during tackles, or falling onto the point of the shoulder | Moderately common — can mimic rotator cuff injury |
Symptoms of a bone bruise
- Deep, aching pain at the site of impact — different from the sharp pain of a muscle strain or the instability of a ligament tear.
- Pain with weight bearing or loading the affected area. Worsens with activity, improves with rest — but never fully settles until healed.
- Swelling — may be present at the joint (if near a joint) but often less dramatic than with a fracture or ligament tear.
- Tenderness when pressing directly over the bone.
- Normal X-ray — this is the hallmark. The X-ray looks fine, but the player is still in significant discomfort.
- Pain that persists beyond 2–3 weeks after the initial injury, which is the typical timeline where soft tissue bruises and minor sprains would be settling.
Recovery timeline
4–8 weeks
Mild bone bruise
small area of oedema, no associated injuries
8–12 weeks
Moderate bone bruise
larger area, or found alongside a ligament sprain
12–24 weeks
Severe bone bruise
extensive oedema, or with cartilage or subchondral involvement
What helps recovery
- Relative rest — reduce or eliminate impact loading on the affected area. This does not mean complete inactivity; non-impact cross-training (swimming, cycling with low resistance if tolerated) maintains fitness.
- Progressive loading — your physiotherapist will guide a gradual reintroduction of load as symptoms allow. The bone needs some mechanical stimulation to heal (per Wolff’s law), but the load must be below the threshold that provokes pain.
- Pain-guided return — the principle is straightforward: if the activity causes pain at the bone bruise site, the load is too high. Dial back and try again in 1–2 weeks.
- Time — bone bruises heal on their own biological timeline. There is no intervention that dramatically accelerates this. Patience is the most important factor.
- Nutrition — adequate calcium, vitamin D, and overall caloric intake support bone healing. Relative energy deficiency (RED-S) impairs bone repair.