what causes polymyalgia
Introduction. Polymyalgia rheumatica (PMR) is a condition that causes pain, stiffness and inflammation in the muscles around the shoulders, neck and hips. The main symptom is muscle stiffness in the morning that lasts longer than 45 minutes.It may also cause other symptoms, including: 1  high temperature (fever) and sweating.olymyalgia rheumatica (PMR) is a condition that causes pain, stiffness and inflammation in the muscles around the shoulders, neck and hips. The main symptom is muscle stiffness in the morning that lasts longer than 45 minutes. It may also cause other symptoms, including: 1  high temperature (fever) and sweating.