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[Conditions](https://durgical.com/en/conditions/) · [Knee](https://durgical.com/en/conditions/)

# Osgood–Schlatter Disease

Osgood–Schlatter disease is a painful bump below the kneecap in growing teenagers, caused by the [patellar tendon](https://durgical.com/en/anatomy/patellar-ligament/) pulling on the shin bone.

Updated 2026-10-23

## Structures involved

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

- [Patellar tendon](https://durgical.com/en/anatomy/patellar-ligament/)
- [Tibia](https://durgical.com/en/anatomy/tibia/)
- [Patella](https://durgical.com/en/anatomy/patella/)

## Why it happens

- [Ossification, growth plate and bone remodeling](https://durgical.com/en/histology/ossification-growth-plate-and-bone-remodeling/)

## What it is

Traction apophysitis of the tibial tubercle in growing adolescents from repeated pull of the patellar tendon.

## Risk factors

- Growth spurt
- Sports with running and jumping
- Tight quadriceps

## Symptoms and signs

- Pain and swelling at the tibial tubercle
- Pain with kneeling, running, or jumping

## Diagnosis

**Clinical**
Age, activity, and tenderness at the tibial tubercle

## Treatment

**Rehabilitation**
Activity modification, stretching, and strengthening. Most resolve when growth finishes.

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

Sources: [Osgood-Schlatter Disease](https://www.ncbi.nlm.nih.gov/books/NBK441995/) (StatPearls (NCBI Bookshelf), 2024).

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Representative model, for educational purposes only.

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Source: https://durgical.com/en/conditions/osgood-schlatter-disease/
License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite as: DurgiPedia (durgical.com), https://durgical.com/en/conditions/osgood-schlatter-disease/