Acute: Renal Failure

: Passing very little or no urine, though output can occasionally remain high.

: Most common; caused by issues "before" the kidney, such as severe dehydration, shock, low blood pressure, or heart failure. acute renal failure

: Nausea, vomiting, shortness of breath, and fatigue. Mental changes : Confusion or drowsiness in severe cases. Categories and Causes : Passing very little or no urine, though

: Damage to the kidney tissues from infections, toxins (nephrotoxic drugs), or autoimmune diseases. Mental changes : Confusion or drowsiness in severe cases

The condition can progress rapidly, making it critical to recognize early signs like . Common symptoms include: Fluid retention : Swelling in the legs, ankles, or feet.

: Blockages "after" the kidney, such as kidney stones, enlarged prostate, or tumors that prevent urine drainage. Acute Kidney Injury - StatPearls - NCBI Bookshelf

Acute kidney injury (AKI), previously known as , is a sudden, temporary, and often reversible loss of kidney function. It can range from a minor loss of function to complete kidney failure and often results from an underlying condition that disrupts blood flow, causes direct organ damage, or blocks urine output. Key Symptoms and Warning Signs