Primary fibromyalgia is a chronic condition characterized by widespread pain, fatigue, and tenderness in the muscles, ligaments, and joints. Secondary fibromyalgia, on the other hand, is a condition that develops as a result of an underlying medical condition, such as rheumatoid arthritis, lupus, or thyroid disorder. Antonyms for secondary fibromyalgia would be primary fibromyalgia or idiopathic fibromyalgia, where the condition arises without any underlying cause. Unlike secondary fibromyalgia, primary fibromyalgia is not associated with any specific disease, injury, or infection. It is a standalone condition that affects millions of people around the world, and is often treated with a combination of medication, therapy, and lifestyle changes.