Bursitis: Inflammation from the bursae may lead to hip pain. The bursae are fluid-filled sacs cushioning the hip joint. Trochanteric bursitis affects the bursa on the surface of the hip, though iliopsoas bursitis influences the bursa on the inside. Standing up and sitting down: Mounting from a seated place or https://www.theorthopaedicandpainpractice.com/what-is-avascular-necrosis-of-the-hip/?_gl=1*xbbxlb*_up*MQ..&gclid=Cj0KCQjwkt6aBhDKARIsAAyeLJ2krYJSOuy5mZksrNqH-VDjQwW1ScD49yD8BUWysDG6u6bJPCSbXVUaAuCPEALw_wcB