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https://www.mayoclinic.org/diseases-conditions/lup…
Lupus - Symptoms & causes - Mayo Clinic
Lupus is a condition in which the body's immune system attacks its own tissues and organs. This is called an autoimmune condition. Lupus causes swelling and irritation, called inflammation, that may affect joints, skin, kidneys, blood cells, brain, heart and lungs. Lupus can be hard to diagnose because its symptoms often are like those of other illnesses. A common sign of lupus is a facial ...