What does having high thyroid antibodies/severe joint pain/lupus mean?

Lupus related: Lupus, an autoimmune disease, happens when the immune system attacks its tissues, causing inflammation, swelling, pain, and damage. Lupus symptoms vary, and early lupus symptoms include fatigue, joint pain, fever, and a lupus rash, especially after being in the sun. Lupus may increase antithyroglobulin antibodies levels without having any other underlying disease.