There are several different kinds of lupus. One kind only seems to effect the skin causing a rash like discoloration, many times in the shape of coins.
There is another kind, SLE, that effects the internal organs causing inflamation of the pericardial sac, or the lining of the lungs, pluerisy, kidney infections, ect.
Lupus can also effect the body's ability to produce blood properly causing anemia. Sometimes Lupus antibodies are found in spinal fluid and this type effects the mind causing headaches, dizzyness, forgetfullness.
These can exist individually or together. It is my understanding that with treatment, the life expectancy of a lupus patient is the normal. Perhaps, if you have the time, you will want to go to the Lupus boards and see what the criteria is for diagnosis. You may also wish to look up the Lupus Foundation on the web. It has much information.
As I am newly dxed I am still learning much myself. Also, I am finding much of the information confusing so I am having to go over it 2 and 3 times to sort it all from other autoimmune diseases. Please look in on the Lupus boards or do a google search for youself. I think you will be much enlightened by it.
Good luck and May God Bless and Keep you