Systemic lupus erythematosus (SLE) is a complex autoimmune condition, which often evolves with severe complications. In SLE, autoantibodies appear, with systemic inflammation and multiple tissue destructions. SLE is the most common form of lupus and is considered more severe than other forms. SLE can affect many parts of the body, including the kidneys, heart, lungs, brain, blood, and skin. Symptoms vary among patients. SLE can follow an unpredictable pattern of remissions (symptoms improve) and flares (symptoms worsen). Renal involvement is one of the most severe complications in SLE patients. The process of depositing the immune complexes in the kidneys could lead to the appearance of lupus nephritis. If the treatment is early and treat-to-target, it can change the course of the renal disease.