A lupus "flare" or "flare up" is when your lupus symptoms worsen and you feel ill as a result. The formal definition of a flare is: A measurable increase in disease activity in one or more organ ...
Dec. 18, 2025 -- At least 1.5 million people in the United States are living with lupus, a chronic and often misunderstood autoimmune disease. What are the most common myths about lupus – and who does ...