Whether the kidney will keep shrinking once it shrinks is mainly considered the cause of its shrinkage. The causes of renal atrophy can be found in congenital renal dysplasia, end-stage renal disease, renal vascular disease and so on. If the cause is congenital, the atrophy may not last forever. If it is end-stage renal disease or renal vascular disease, the atrophy may last forever as the disease progresses. Renal atrophy is actually a term for pathologic anatomy. In the case of renal atrophy due to congenital renal dysplasia, there is no abnormality in renal function, and usually the kidney will not keep shrinking. If renal atrophy occurs in end-stage renal disease, atrophy of both kidneys may progress as the disease progresses. If renal vascular disease causes renal atrophy, if timely treatment is given and renal vascular disease improves, the kidneys may not continue to atrophy; if timely detection and effective treatment are not given, resulting in renal hypoplasia, the kidneys may atrophy down the road. Renal atrophy may also have other causes, it is recommended that patients go to regular hospitals in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.