The hip refers to the region of the body where the hip joint is. The main structure of the hip is a ball-and-socket joint. This joint is technically called the acetabulofemoral joint. The joint connects the femur (thigh bone) and acetabulum of the pelvis. Hips bear the weight of the body's trunk and allow us to be mobile. Because of the weight it bears, a layer of cartilage protects the bones. Additionally, the hip joint is one of the most flexible joints in the body and accommodates extreme force. It also plays a large role in maintaining balance.
Numerous things can cause hip pain, but one of the main causes is osteoarthritis. Other causes include rheumatoid arthritis, injury to a tendon, or a pinched nerve. Often, NSAIDs or steroids can manage pain from these injuries. In more severe cases, a hip replacement might be necessary.