Trochanteric bursitis , another name for hip bursitis, is a painful condition that affects the bursae close to the hip joint. The bursae are tiny sacs that are fluid-filled and function to lessen friction between muscles, tendons, and bones. Hip bursitis is characterized by the inflammation of the bursae , which causes pain and discomfort in the hip and the surrounding region. Brief Anatomy of Hip Joint: The head of the femur (the thigh bone) and the acetabulum of the pelvis come together to form the hip joint, which is a ball and socket joint. The trochanteric bursa , which is situated on the outer part of the hip, and the iliopsoas bursa , which is situated on the front of the hip, are just two of the bursae that surround the hip joint. Causes of Hip Bursitis: There are numerous factors that can lead to hip bursitis, including: hip joint overuse or repetitive stress hip injury brought on by a fall or direct blow Walking or running with an improper gait or posture Medical condition