Acute renal failure is a clinical syndrome caused by various etiologies, so the primary approach to treatment is addressing the underlying cause.It is crucial to actively correct insufficient effective circulating blood volume due to various factors and maintain adequate renal perfusion, while closely monitoring fluid intake and output as well as weight changes.Ensuring or increasing urine output is essential, and efforts should be made to avoid renal damage during treatment.During the oliguric phase, the most critical aspects are managing water - electrolyte imbalances and various complications, such as treating hyperkalemia and metabolic acidosis, as well as preventing and treating infections.Additionally, nutritional therapy is an indispensable component of the treatment plan.In cases of severe hyperkalemia or metabolic acidosis, prompt hemodialysis should be initiated.