Lupus is an autoimmune disease that causes the body to attack otherwise normal and healthy tissue and organs. Common symptoms that affect the body include fatigue, pain, swelling, rash, sensitivity to light, skins lesions, and mouth and skin ulcers. The disease affects everyone differently. For most people, symptoms tend to be manageable and mild, but are occasionally punctuated by "flares," the term used when symptoms intensify. Flares are characterized by increased fatigue, pain, fever, rash, and dizziness.