Periostitis

Populations and Risk Factors

Runners and athletes with repetitive impact activities
Those with sudden increases in training intensity or volume (> 10% rule violation)
Individuals with biomechanical imbalances (overpronation, leg length discrepancy)
Common in the tibial region (shin splints) and olecranon (elbow)
Military recruits during basic training
Athletes transitioning to harder training surfaces

Repetitive traction mechanism: Muscles and fascia repeatedly pull on the periosteum at their attachment sites, causing localized inflammation. In the lower leg, tibialis posterior and soleus pulling on the medial tibia is the classic mechanism
Direct trauma: A single blow to a bone surface can also trigger periostitis (e.g., contusion to the tibial crest)
Progression risk: Chronic periosteal irritation weakens the underlying cortical bone, which can progress to a stress fracture if the repetitive load continues
Compartment syndrome risk: Periostitis with significant swelling in the anterior compartment can contribute to acute exertional compartment syndrome
"Comparable sign": A specific position or pressure that reliably reproduces the patient's pain — this is the assessment anchor for periostitis

Sharp, localized pain when pressure is applied directly to bone — this is the defining feature
Local heat, redness, and swelling over the affected bone
Pain increases with activity, improves with rest
Loss of function or guarded movement of the affected limb
"Comparable sign": a specific position or pressure point that reproduces the pain
Red flags: Unrelenting pain, numbness, or loss of distal pulses signals possible acute compartment syndrome — emergency referral; focal point tenderness at a single spot (rather than diffuse tenderness along the bone) may indicate stress fracture — refer for imaging

CMTO Appendix category A1 (MSK conditions)
Key differential: periostitis (diffuse tenderness along the bone) vs. stress fracture (focal point tenderness at a single spot). Tuning fork test helps differentiate
Red flag: unrelenting pain, numbness, or loss of distal pulses = emergency referral (acute compartment syndrome)
Must rule out septic arthritis (can cause irreversible joint damage within 24 hours) when periosteal inflammation is accompanied by fever and systemic signs

Acute phase: Direct circulatory massage over the site is locally contraindicated
Physician approval recommended, especially if the cause is unclear or systemic infection cannot be ruled out
Ice massage and gentle stretching may help manage pain in acute and subacute stages
Avoid: Rigorous massage if the client is on anti-inflammatories (may mask pressure sensitivity and lead to excessive force)
Post-acute strategy: Once inflammation subsides, focus on muscle balancing and reducing hypertonicity in muscles attaching to the affected periosteum (tibialis posterior, soleus, peroneals)
Biomechanical assessment: Address overpronation, leg length discrepancy, and other factors contributing to repetitive periosteal stress

Periostitis is inflammation of the bone membrane from repetitive overuse. It is a primary component of shin splints and can progress to stress fractures
Direct circulatory massage over the affected site is locally contraindicated during the acute phase. Ice massage and gentle stretching are appropriate
The "comparable sign" (sharp pain directly on bone with pressure) differentiates periostitis from soft tissue injury
Red flag: unrelenting pain, numbness, or loss of distal pulses signals possible acute compartment syndrome requiring emergency referral
Once acute inflammation subsides, focus on reducing hypertonicity in muscles attaching to the affected periosteum to prevent recurrence
Tuning fork test (128 Hz): focal pain at a single point suggests stress fracture concern requiring imaging