General information only, and not a substitute for medical advice. If you have
severe pain, a deformity, cannot bear weight, or have numbness or an open wound, seek
urgent medical care.
Bone is stronger than the tendon attached to it — until it isn’t. An avulsion fracture
happens when a tendon or ligament contracts or is stretched hard enough that instead of
tearing itself, it pulls a fragment of bone away with it.
Most are stable and heal well. The catch is that they feel exactly like a sprain, so
they are frequently treated as one.
Worried about sharp pain over bone?
Book an assessment online or call
1300 525 666 — Southport and Springwood, no referral needed.
How they happen
Almost always a sudden, forceful movement:
- A twist or roll of the ankle, often on uneven ground
- A forceful pull while sprinting, kicking, or changing direction
- A jammed finger, where the tendon pulls on the bone as the joint is forced
Where they occur
Ankle. Small avulsion fractures near the outer ankle bone are common
after a roll, and present much like an
ankle sprain or fracture.
Finger. A tendon can pull a small fragment of bone away from a jammed
finger — depending on the site, sometimes called a bony mallet. See
jammed finger or fracture and
hand injuries.
Pelvis and hip. More common in adolescents during sport, because the
growth plates are a weaker point than the tendon. These warrant prompt assessment — see
growth plate injuries.
Symptoms
- Sudden sharp pain at the moment of injury
- Point tenderness over one specific bony spot, rather than general soreness
- Swelling and bruising
- Pain walking, or reduced function in the hand or finger
- Sometimes a pop, though not always
That second one is the most useful. General soreness across an area suggests soft
tissue; sharp pain when you press one small point on bone suggests something else.
When to get it imaged
Arrange assessment and imaging if you cannot bear weight comfortably after a foot or
ankle injury, the pain sits over bone rather than spread across the area, symptoms are not
improving after 24 to 48 hours, or it was a significant sporting injury.
You cannot confirm an avulsion fracture at home. It takes an X-ray alongside a clinical
examination.
First 24 hours
- Protect the area and avoid painful activity
- Ice for 10 to 15 minutes at a time, with a cloth barrier
- Light compression if comfortable
- Elevate to reduce swelling
If the symptoms are significant, treat it as a fracture until it has been assessed.
Point tenderness on one bony spot rather than general soreness? That needs an X-ray.
Book online or call
1300 525 666.
Treatment
This depends on where it is, how large the fragment is, and whether the injury is
stable.
Stable avulsion fractures are usually protected in a boot or splint,
with activity modified and a staged return.
Less stable injuries need closer follow-up, longer immobilisation, or
orthopaedic review — particularly where the fragment has pulled some distance away.
Healing timelines vary widely with the site and the person.
Frequently asked questions
Is an avulsion fracture the same as a sprain?
No. A sprain is a ligament injury; an avulsion fracture involves bone. They can happen
together and feel similar, which is why imaging is often recommended.
Do they always need surgery?
No. Many small avulsion fractures are treated without it, though some patterns need
orthopaedic assessment depending on the site and how far the fragment has moved.
Why does it matter if it is treated as a sprain?
Many would settle anyway. But some need protecting for longer than a sprain would, and
a fragment left displaced can cause ongoing pain.
Book an assessment
If you have sharp, localised pain over bone after a twist or a fall, it is worth
having imaged rather than assuming it is a sprain.
Book online or call
1300 525 666. Clinics at
Southport on the Gold Coast and
Springwood in South Brisbane.