In our body, there are various immune cells including B cells and T cells. Lupus is a disease in which mutant B cells attack skin and cause inflammation. Rheumatoid arthritis also causes inflammation by attacking all body nodes by increasing mutant T cells. The cause is different with Lupus but the symptoms are similar.
This ailment is considered common in the USA, affecting over 200,000 Americans per year. Sadly, there is no known cure for lupus at this time, but treatments over the past few years have really been useful in keeping lupus patients mobile and decreasing their symptoms.