Systemic lupus erythematosus (SLE) is a multisystem, autoimmune disease. SLE mainly affects women and causes fatigue, rashes (often associated with photosensitivity), hair loss and inflammatory arthritis. However, it can also affect men in whom it is often more severe with a greater likelihood of renal involvement and a greater degree of organ damage. According to the British Society for Rheumatology guideline, the diagnosis of SLE requires a combination of clinical features and the presence of at least one relevant immunological abnormality.