Polymyalgia rheumatica, often called PMR, is a disease that causes pain, stiffness and limitation of mobility in the neck, nape of the neck, shoulders, arms, hip, torso, pelvic girdle and thighs. This condition, of unknown origin, is only suffered by people over 50 years of age. The pain, which does not cause swelling, appears after resting, usually at night. Inactivity, such as a long drive or sitting in the same position for a long time can cause the stiffness to come back. In addition, it is very common for patients to have problems lifting the upper arms above the shoulders. Today the most effective treatment for PMR is low doses of corticosteroids.