Fibromyalgia syndrome (FMS) causes widespread, chronic pain and a variety of debilitating symptoms beyond just muscle pain, affecting energy, concentration, gastrointestinal health, and psychological well-being. Common symptoms include muscle stiffness, fatigue, cognitive difficulties (often termed 'fibro fog'), and emotional issues like anxiety and depression. The complexity of FMS is reflected in its numerous associated conditions, including hormonal and neurological dysfunctions.