I am a 48 year old female and am avid runner.  I was just diagnosed with avascular necrosis of my knee following an accident tripping over my dog.  I was told to never run again.  Questions:1)  If I run, will it damage my knee worse.2)  Would long term use of birth control pills cause this disease?3)  I used hydrocortisone every day on various areas of my body due to try skin.  Would this be a factor?Thanks.

Summarized question: Will running further damages avascular necrosis of the knee?