In general, renal atrophy cannot be recovered, and renal atrophy means that the kidney has developed chronic structural changes, often accompanied by chronic renal failure, even to the stage of uremia requiring renal replacement therapy, hemodialysis or peritoneal dialysis. Only in very few cases can there be reversible changes: unilateral renal artery stenosis that appears early, after the stenosis or obstruction is improved by interventional procedures and the kidney regains blood flow, there can be some degree of recovery based on the original atrophy, but the degree of recovery is very limited, and there is only extremely limited help to improve renal function. There are no particularly effective recovery measures for renal atrophy in general.