Introduction Photosensitivity, or sun sensitivity, is a hallmark symptom of systemic lupus erythematosus (SLE) and related autoimmune conditions. For people with lupus, exposure to sunlight—especially ultraviolet (UV) rays—can trigger skin rashes, systemic disease flares, and increased inflammation. The effects of sun exposure range from mild skin irritation to severe exacerbations of lupus symptoms affecting internal organs. Because sun exposure can significantly impact the disease course and quality of life, understanding the relationship between lupus and photosensitivity and adopting effective sun protection strategies are vital for managing lupus safely and comfortably. What Is Photosensitivity in Lupus? Photosensitivity refers to an increased…