A number of things can lead to this problem: Trauma: Hip accidents, dislocations, or fractures can right damage blood vessels, disrupting the blood source towards the bone. Treatment for hip osteonecrosis may differ according to the severity and phase with the issue, and alternatives consist of conservative administration, for example https://www.theorthopaedicandpainpractice.com/what-is-avascular-necrosis-of-the-hip/?_gl=1*xbbxlb*_up*MQ..&gclid=Cj0KCQjwkt6aBhDKARIsAAyeLJ2krYJSOuy5mZksrNqH-VDjQwW1ScD49yD8BUWysDG6u6bJPCSbXVUaAuCPEALw_wcB