Sinus Tarsi Syndrome

 The sinus tarsi is a small space on the outer side of the foot between the talus and calcaneus bones. It contains ligaments, joint tissue, and nerve endings that contribute to stability, balance, and awareness of foot position during movement.

Sinus tarsi syndrome occurs when this region becomes irritated, often following an ankle sprain or repetitive stress. Although inflammation may be present early on, ongoing symptoms are commonly related to reduced joint stability, altered foot mechanics, and decreased load tolerance of the surrounding tissues. These changes can affect balance and confidence with weight-bearing activities, particularly on uneven ground.

• Pain on the outer side of the ankle or foot, often in a small localized area

• Tenderness when pressing into the sinus tarsi region

• Pain with walking, running, or uneven surfaces

• A feeling of ankle instability or reduced confidence in balance

• Discomfort during turning or side-to-side movements

• Symptoms that persist after an ankle sprain

• Pain that increases with prolonged standing or activity

• Previous ankle sprain, particularly involving the subtalar joint

• Ongoing ankle instability or reduced neuromuscular control

• Altered foot mechanics during walking or running

• Reduced strength of the foot and ankle musculature

• Limited mobility or stiffness in the ankle or subtalar joints

• Repetitive loading on uneven or sloped surfaces

• Early return to sport or activity after injury

Physiotherapy for sinus tarsi syndrome focuses on improving joint stability, restoring strength and control, and increasing the foot’s ability to tolerate load. Because persistent symptoms are often related to altered mechanics and reduced neuromuscular control rather than inflammation alone, treatment emphasizes progressive rehabilitation and movement retraining.

Physiotherapy management may include:

• Progressive strengthening of the foot, ankle, and lower limb muscles

• Balance, proprioception, and neuromuscular control training

• Gradual return to walking, running, and sport-specific activity

• Mobility work for the ankle and subtalar joints when indicated

• Movement retraining to improve foot positioning and load distribution

• Activity and load management to support recovery while maintaining movement

• Taping, bracing, or footwear guidance when appropriate

Recovery timelines vary depending on symptom duration, injury history, and activity demands. Many individuals experience meaningful improvement over several weeks to months with a structured rehabilitation program. Early, progressive treatment can help restore confidence in weight-bearing and reduce the risk of ongoing ankle symptoms.