The immune system is partly made up of white blood cells in your body that fight off disease. In lupus, these white blood cells think that the healthy cells of the body around them are diseased, so they end up attacking healthy parts of the body. Lupus can be deadly. It causes swelling and tissue damage, and can attack any part of the body. It most commonly affects the heart, joints, skin, lungs, blood vessels, kidneys and the brain/nervous system. Some symptoms include: fatigue, fever with no cause, hair loss, mouth sores, sensitivity to sunlight, a skin disease, and Raynaud's syndrome. There is treatment for lupus, called immunosuppression, which is medicine that stops the white blood cells from damaging healthy cells for a while. After a while, this medicine wears off, and then the white blood cells go back to hurting healthy parts of the body again. For the disease of lupus, there is no cure that stops the white blood cells from attacking healthy parts of the body forever, but doctors are not giving up on finding a cure.