Strains on the muscles round the hip and pelvis may cause pain and spasm. The commonest strains are groin pulls and hamstring strains. Osteoarthritis: This degenerative joint affliction occurs if the protective cartilage cushions the ends of bones and wears down as time passes. Osteoarthritis can cause pain, stiffness, and https://www.theorthopaedicandpainpractice.com/what-is-avascular-necrosis-of-the-hip/?_gl=1*xbbxlb*_up*MQ..&gclid=Cj0KCQjwkt6aBhDKARIsAAyeLJ2krYJSOuy5mZksrNqH-VDjQwW1ScD49yD8BUWysDG6u6bJPCSbXVUaAuCPEALw_wcB