19/11/2025
Os Trigonum
Ankle pain can be frustrating, particularly for athletes, dancers, and active individuals, and sometimes the cause is less obvious than a sprain or overuse injury. One hidden source is the os trigonum, a small extra bone located at the back of the ankle. While many people have this variant without symptoms, in some it becomes problematic, especially when the ankle is repeatedly pointed or pushed into plantarflexion.
The os trigonum develops in adolescence when a small bone fragment fails to fuse with the talus. For some, it remains silent; for others, stress, trauma, or repetitive motion can irritate surrounding soft tissues, leading to posterior ankle pain. Symptoms include tenderness at the back of the ankle, swelling, stiffness, and pain when pointing toes, jumping, or pushing off. If left untreated, it may limit activity and impact performance.
Physiotherapy management focuses on reducing irritation, improving ankle strength, and restoring normal mechanics. Podiatry input can include supportive footwear, orthotics, or padding to ease strain. Where pain persists, imaging can confirm diagnosis and guide referral for further options, including surgery.
If you’re experiencing ankle pain, book an appointment with Brisbane Physiotherapy & Podiatry today for tailored treatment and a safe return to activity.
- Brisbane Physiotherapy & Podiatry