👉 Fibromuscular disease (FMD), also known as fibroinflammatory disease, is a chronic inflammatory condition that affects the muscles and nerves of the central nervous system. It can affect any part of the body, but it tends to be most common in the neck, shoulders, back, and arms. The symptoms of FMD include pain or discomfort in certain areas of the body, such as the neck, shoulder blades, or back. These symptoms can also be accompanied by fatigue,