What Shin Splints Feels Like
Shin splints — clinically known as medial tibial stress syndrome (MTSS) — is an overuse injury where the connective tissue and bone along the inner edge of the tibia become inflamed and tender. It sits on a continuum: pushed too far, MTSS becomes a tibial stress reaction, then a true stress fracture.
- Diffuse, aching pain along the inner edge of the shinbone, usually covering 5+ cm
- Tenderness when you press along the bone with a fingertip
- Pain that warms up during a run but returns worse afterward
- Morning stiffness in the shins after high-mileage days
- Tightness through the calves and anterior tibialis
Early Warning Signs
Catching shin splints at this stage is the difference between a week of reduced training and a multi-week shutdown.
- Diffuse ache along the inside of the shin
- Tenderness after — not during — running
- Tightness in calves and shins after long sessions
When to Stop and See a Clinician
- Sharp, localized pain in one spot on the tibia
- Pain that wakes you up at night
- Pain that worsens through a run instead of warming up
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