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# Medial tibial stress syndrome (shin splints)

Medial tibial stress syndrome, or shin splints, is exercise-related pain along the inner edge of the shin bone from repeated loading.

Updated 2026-10-29

## Structures involved

Tap one to see what it is and open it in 3D.

- [Tibia](https://durgical.com/en/anatomy/tibia/)
- [Soleus](https://durgical.com/en/anatomy/soleus-muscle/)
- [Tibialis posterior](https://durgical.com/en/anatomy/tibialis-posterior-muscle/)
- [Crural fascia](https://durgical.com/en/anatomy/crural-fascia/)
- [Flexor digitorum longus](https://durgical.com/en/anatomy/flexor-digitorum-longus/)
- [Gastrocnemius (inner head)](https://durgical.com/en/anatomy/medial-head-of-gastrocnemius/)
- [Interosseous membrane](https://durgical.com/en/anatomy/interosseous-membrane-of-leg/)
- [Navicular](https://durgical.com/en/anatomy/navicular-bone/)

## Why it happens

- [Bone remodeling](https://durgical.com/en/physiology/bone-remodeling/)

## What it is

Exercise-related pain along the inner (posteromedial) border of the lower two-thirds of the tibia, known as shin splints. It is a bone stress reaction caused by repeated loading.

## Who gets it

One of the most common overuse injuries in runners, military recruits and dancers, and in sports with jumping.

## Causes

- Repeated impact loading of the tibia
- Sudden increase in running distance, speed or frequency
- Training on hard surfaces or with worn footwear

## Risk factors

- Female sex
- Higher body mass index
- Excessive foot pronation or [navicular](https://durgical.com/en/anatomy/navicular-bone/) drop
- Previous medial tibial stress syndrome
- Little running experience
- Reduced hip range of motion in some studies

## Pathophysiology

The exact mechanism is debated. One view is traction on the periosteum by the [soleus](https://durgical.com/en/anatomy/soleus-muscle/), [flexor digitorum longus](https://durgical.com/en/anatomy/flexor-digitorum-longus/), [tibialis posterior](https://durgical.com/en/anatomy/tibialis-posterior-muscle/) and [crural fascia](https://durgical.com/en/anatomy/crural-fascia/); the more accepted view is bone overload, with remodeling that cannot keep up with repeated bending. It sits on a continuum with tibial stress fracture.

## Symptoms and signs

- Diffuse aching pain along the inner border of the shin, over several centimeters
- Pain at the start of exercise that may ease while running, then returns after
- In later stages, pain with less activity and at rest
- Diffuse tenderness along the posteromedial tibia

## Red flags

- Focal, sharp point tenderness, night pain or pain at rest (suspect stress fracture)
- Tight, burning calf pain with numbness during exercise that settles with rest (suspect chronic exertional compartment syndrome)
- Cold foot or claudication during exercise (suspect [popliteal artery](https://durgical.com/en/anatomy/popliteal-artery/) entrapment)

## Diagnosis

**Clinical**
Diagnosis is clinical: exercise-induced pain and diffuse tenderness over the posteromedial [tibia](https://durgical.com/en/anatomy/tibia/), without features of other causes.

**Tests**
Compartment pressure testing if chronic exertional compartment syndrome is suspected; bone health tests in recurrent bone stress injury.

**Imaging**
X-rays are usually normal. MRI separates periosteal and marrow edema from a fracture line; bone scan is an alternative.

## Differential diagnosis

- Tibial stress fracture
- Chronic exertional compartment syndrome
- Popliteal artery entrapment syndrome
- Muscle strain or tendinopathy
- Nerve entrapment
- Bone tumor or infection

## Goal of treatment

Let the bone adapt by reducing load, keep fitness with low-impact activity and return gradually to running while correcting risk factors.

## Treatment

**Conservative**
Relative rest from impact, ice, and cross-training such as cycling or swimming.

**Medical**
Short courses of simple analgesics or NSAIDs for pain.

**Rehabilitation**
Graded return-to-run plan; calf, foot and hip strengthening; review of running technique.

**Conservative**
Suitable footwear and, for excessive pronation, orthoses; evidence for these and for shockwave therapy is limited.

**Surgical**
Rarely, posteromedial fasciotomy for long-standing pain that fails rehabilitation.

## Complications

- Progression to tibial stress fracture
- Recurrence with early return to training
- Long time away from sport

## Prognosis

Most athletes recover with load management, though recovery can take weeks to months and recurrence is common.

## Prevention

- Gradual increases in training load
- Rest days and varied surfaces
- Strength training of the calf and hip

## Test yourself

Think of the answer, then tap the question to see it.

## Where is the pain located in medial tibial stress syndrome?

Along the posteromedial border of the lower two-thirds of the tibia, over a diffuse area.

## Which finding suggests a tibial stress fracture rather than shin splints?

Focal point tenderness with night or rest pain, rather than diffuse tenderness along the shin.

## How does chronic exertional compartment syndrome differ from shin splints?

It causes tight, burning pain and sometimes numbness that builds during exercise and settles with rest; compartment pressure testing confirms it.

## Which imaging test separates stress reaction from stress fracture?

MRI, which shows periosteal or marrow edema with or without a fracture line.

## What are two risk factors for medial tibial stress syndrome?

Female sex, higher body mass index, excessive pronation, previous episodes or a sudden rise in training load.

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## Related conditions

- [Acute compartment syndrome](https://durgical.com/en/conditions/acute-compartment-syndrome/)
- [Tibial shaft fracture](https://durgical.com/en/conditions/tibial-shaft-fracture/)
- [Metatarsal fractures (including stress fractures)](https://durgical.com/en/conditions/metatarsal-fractures/)
- [Flatfoot (pes planus)](https://durgical.com/en/conditions/flatfoot/)
- [Achilles Tendinopathy](https://durgical.com/en/conditions/achilles-tendinopathy/)

Educational information, not medical advice. For any symptom, see a health professional.

Sources: [Medial Tibial Stress Syndrome](https://www.ncbi.nlm.nih.gov/books/NBK538479/) (StatPearls (NCBI Bookshelf), 2025).

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Source: https://durgical.com/en/conditions/medial-tibial-stress-syndrome/
License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite as: DurgiPedia (durgical.com), https://durgical.com/en/conditions/medial-tibial-stress-syndrome/