Polymyalgia rheumatica is a syndrome characterized by symmetrical pain and stiffness in the shoulder and pelvic girdle muscles, most commonly affecting those over 50 years old. It is important to rule out giant cell arteritis when diagnosing PMR. Blood tests like ESR and CRP will often be elevated. Treatment involves corticosteroids, which provide rapid relief, and exercise. PMR has a generally good prognosis but relapses can occur if steroids are tapered too quickly.