Lupus is a systemic autoimmune disease that can attack the skin, joints, organs, nervous system, blood cells, kidneys, or some combination of body systems. It occurs when your body's immune system attacks your own tissues and organs. It is most common in women, though lupus can also occur in men. Lupus is not a contagious disease. When the condition affects your skin, it will cause some common symptoms include butterfly rash, sores and rashes in the face, and small, red, coin-shaped areas. Although there is no cure for lupus, treatments can help control symptoms. People with Lupus skin disease had better use sunscreen to protect themselves from the sun’s ultraviolet rays. Besides, go for a doctor and the doctor will prescribe some medications to reduce pain and swelling.