Lupus erythematosus is an autoimmune disease, which can be very severe in some cases and mild in others. For example, cutaneous lupus erythematosus generally does not involve major organs and usually presents with mild symptoms, primarily affecting the skin and mucous membranes. However, systemic lupus erythematosus can affect significant organs like the kidneys and heart in many patients, often leading to severe medical conditions. Especially, patients with rapidly progressive glomerulonephritis and those with coronary atherosclerotic heart disease tend to have a higher mortality rate. If systemic lupus erythematosus is diagnosed, it is crucial to receive standardized treatment early. Typically, treatment involves long-term maintenance with corticosteroids and immunosuppressants to control the progression of the disease and reduce the likelihood of mortality.