Fibromyalgia is a chronic disorder characterized by widespread pain and affects approximately 10 million people in the U.S., predominantly women aged 25-55. Diagnosis is based on experiencing widespread pain for over three months, with a treatment plan tailored to individual symptoms and involving medications, physical therapy, and self-help strategies. Common treatments include over-the-counter pain relievers, exercise, relaxation techniques, and cognitive-behavioral therapy to manage symptoms and improve quality of life.