http://kidshealth.org/parent/medical/arthritis/lupus.html
Lupus is a rheumatic condition (having to do with the muscles, joints, and connective tissue) that affects 1.5 million people in the United States, including an estimated 10,000 children. Nearly 90% of people who are diagnosed with lupus are female. This document reviews the symptoms of the disease and how it can be managed.