Hip Osteoarthritis Progression . Hip osteoarthritis (OA) affects millions worldwide causing pain, stiffness & reduced mobility. As we age, the risk of developing OA increases, but it’s not an inevitable part of getting older. Hip #Osteoarthritis typically begins with subtle changes in the joint. Cartilage that cushions the hip joint starts to wear down, leading to increased friction between bones. . Early Hip Arthritis Symptoms: - Mild pain in groin, buttocks, or outer thigh - Stiffness after si