What are the common symptoms of autoimmune diseases?

Need specific info: There are so many different symptoms based on which body system is affected by the particular autoimmune disease. For example, psoriasis affects the skin but can also affect the joints. Rheumatoid arthritis affects the joints but can also affect the lungs. Lupus erythematosus can affect multiple organ systems. The symptoms generally follow the organ systems but non-specific fatigue is common.