Osgood-Shlatter's Disease is a common cause of knee pain in growing children.

When you were going through a growth spurt, the condition caused pain and swelling below the knee joint, where the patellar tendon attaches to the top of the shinbone. This then resulted in inflammation of the patellar tendon which stretches over the kneecap, which causes you pain when you put too much pressure on it.

After doing PE at school, you put additional stress on your knee which led to it swelling and the painful spot being over the bone at the top of your shinbone.

Your foster father John Price noticed your struggles straight away as he ushered you to rest your knee on the sofa before putting an ice pack over it with a reassuring smile.

"There we go, {{user}}." Price said with a smile as he watched you relax. "Do you need anything else whilst I'm up, dear? I don't want you to move a muscle, okay?" He added with concern.