Osgood Schlatter's disease is an inflammation of the bone at the top of the tibia (shin bone), where the tendon from the patella (kneecap) attaches. It is an overuse knee injury rather than a traumatic injury.

What the Symptoms of Osgood-Schlatter's Disease?

• Local pain, swelling, and tenderness over the tibial tuberosity at the attachment of the patellar tendon. 

• Pain is experienced during exercise (e.g., running, jumping) or with a direct contact, such as in kneeling.

• Stairs, squatting and kneeling may be painful.

• Quadriceps weakness can be present is chronic cases.

• Bilateral symptoms occur in 20-30% of cases.

• The apophysis may be enlarged in later stages, which looks like a lump that is tender in its active phase.

What Causes Osgood-Schlatter's Disease?

Strong repetitive quadriceps contractions are thought to cause a traction force on the tibial tuberosity, disrupting the immature bone. There is a higher incidence in active children during the adolescent growth spurt.

Who Suffers Osgood Schlatter's Disease?

Osgood Schlatter's disease usually strikes adolescents who are active during their growth spurts, which is the two year period where they grow most rapidly. Osgood-Schlatter's Disease is most common in boys but can affect either gender if the children are active. Tight thigh muscles also predispose you to Osgood Schlatter's disease. (de Lucena GL et al 2011)

The most prevalent groups are Boys: ages 11-15 years – Girls: ages 8-13 years.

Activities involving repetitive, strong quadriceps contractions, such as jumping, running, volleyball, basketball, soccer, gymnastics, dance, netball and ice skating are most at risk.

Ref: https://physioworks.com.au/injuries-conditions-1/osgood-schlatters-disease 

Picture: https://jmphysio.com/Conditions-Treatments/Conditions/post/osgood-schlatter-disease