ain medicine stands for acute interstitial nephritis, an acute kidney injury disease. Acute interstitial nephritis, a disease characterized by acute inflammation of renal tubular interstitium, can be caused by a variety of etiologies such as pyelonephritis, systemic infections, systemic lupus erythematosus, or the application of non-steroidal anti-inflammatory drugs, which can be manifested as acute renal failure, proteinuria, hematuria and other symptoms. Treatment of acute interstitial nephritis: discontinuing non-steroidal anti-inflammatory drugs can alleviate the symptoms; hemodialysis is needed if pulmonary edema and hyperkalemia are combined in the period of renal failure; glucocorticosteroids, such as prednisone, can be applied as prescribed by the doctor. Acute interstitial nephritis should cooperate with the doctor, active treatment.