Avascular necrosis of the hip joint, how do i start the progress of treatment ?

AVN of the Hip: If you have true avn of the hip then you need to see an orthopedic surgeon. There are various stages of avn. In the early stages there is a remote chance of salvage of the hip. If the avascularity is too far advanced then you need to discuss treatment options with your orthopedist. As you are only 40 years old, if you need a hip arthroplasty it is going to have to last quite some time.