Symptomatic treatment with pain killers and minimized bodyweight bearing might be the most suited to Stage 0 disease. During this stage by definition one other hip has avascular necrosis which hip is "at risk" for building AVN. The condition using this regime is 1 does not when to prevent - https://www.theorthopaedicandpainpractice.com/what-is-avascular-necrosis-of-the-hip/?_gl=1*xbbxlb*_up*MQ..&gclid=Cj0KCQjwkt6aBhDKARIsAAyeLJ2krYJSOuy5mZksrNqH-VDjQwW1ScD49yD8BUWysDG6u6bJPCSbXVUaAuCPEALw_wcB