Lupus erythematosus is not contagious. The occurrence of lupus erythematosus is related to genetic factors, the levels of sex hormones in the body, and certain environmental factors that the body is exposed to. It is the combined effect of these factors that lowers the body's immune tolerance, causing disorder in immune function, and thus leading to this autoimmune disease. Therefore, unlike diseases caused by various pathogens, it cannot be transmitted from person to person. When normal individuals come into contact with patients, there is no need to fear contagion or to isolate the patients. During the remission and stable phases of the disease, lupus patients can engage in regular work, study, and participate in social activities just like healthy individuals.