Overview
Osgood‑Schlatter disease is an overuse injury causing pain at the tibial tubercle in growing adolescents.

Causes and risk factors
Repetitive stress from jumping and running during growth spurts.

Symptoms
Pain and swelling below the kneecap, worsened by activity.

Diagnosis
Clinical exam; imaging if needed.

Treatment
Rest, ice, stretching, activity modification, and pain relief.

When to seek care
Persistent knee pain in active adolescents should be evaluated.