Kidney injury refers to damage that occurs from the kidney and can be classified as medical or surgical. The most common causes of surgical kidney injury are traumatic injury resulting in kidney contusion or kidney rupture, and kidney stones. The most common causes of medical kidney injury are glomerulonephritis, diabetic nephropathy, hypertensive kidney damage, and nephrotic syndrome. Therefore, for the recovery of kidney injury, the specific cause must be clarified first. If it is surgical in nature, then surgical treatment is often required to repair the kidney. If the kidney damage is caused by internal diseases, then it is necessary to assess and diagnose the specific kidney disease by checking the kidney function, 24-hour urine protein quantification, and autoimmune antibodies, etc. If necessary, kidney puncture should be performed to clarify the type of pathology, and the treatment can first apply Cordyceps preparation to protect the kidney and valsartan drugs to reduce urine protein, and choose hormone or immunosuppressive therapy. When the kidney damage reaches a certain level, renal replacement therapy, such as hemodialysis or peritoneal dialysis, is required. So there are many different treatments for kidney injury, depending on the cause of kidney injury and the degree of kidney injury to choose the targeted treatment.