SLE or Systemic lupus erythematosus is an autoimmune disease. There is no absolute cause associated with the disease in the majority of cases though some drug use can trigger it. Joint pain, swelling, fatigue and rashes are also symptoms of SLE. Though rashes are usually across the cheeks and nose, a widespread rash is also sometimes noted.
( see http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH000147... )
Fatty Liver -usually has no symptoms, but when severe you can experience fatigue, weight loss and pain in the upper right part of your abdomen. The disease happens when for some reason, your liver is unable to break down fat. Fatty liver disease can range from harmless without symptons to life-threatening.
There are no specific treatments for fatty liver disease ...treatments are usually based at lifestyle changes to improve nutrition, limit fatty foods and alcohol or other substances that can further stress or overwork the liver.
While fear is understandable, taking an active part in your health is the better option. Perhaps investigate homeopathic medicine or alternative medicine solutions and a nutritionist to find the right dietary guidelines to follow.