Hip arthritis is cartilage loss in the body's largest ball-and-socket joint, most often osteoarthritis from decades of load, though inflammatory types such as rheumatoid arthritis also reach the hip. What makes the hip distinctive is where it hurts: true hip-joint pain is usually felt in the groin - patients often cup a hand around the side of the hip in a C-shape to describe it - and may run down the front of the thigh toward the knee. Pain over the outer hip usually belongs to trochanteric bursitis, and buttock pain often traces back to the spine - which is why the location question matters so much here.
The earliest functional change is typically lost internal rotation: crossing the legs, pivoting toward the affected side, and getting out of a low car seat become awkward before walking distance shortens. Startup stiffness after sitting, difficulty with socks and shoes, and - in later stages - night pain complete the pattern. Because the socket is deep, the hip tolerates early cartilage loss quietly, and many patients first present when the joint has already stiffened.
At Mountain Spine & Orthopedics, evaluation is aimed at proving the hip joint itself is the source before any treatment is chosen - examination, standing X-rays, and where the picture is mixed, a diagnostic image-guided injection whose numbing phase answers the question directly.

