Acute Kidney Injury (AKI) is a sudden decrease in kidney function, which can happen within hours or days. This condition can lead to a buildup of waste products in the blood, causing symptoms like fatigue, swelling, and changes in urination. Common causes of AKI include dehydration, certain medications, and severe infections. If not treated promptly, AKI can lead to serious complications, including chronic kidney disease or even kidney failure. Doctors often use tests like blood tests and urine tests to diagnose AKI. Early detection and treatment are crucial for recovery and to protect the kidneys from long-term damage.