Mild renal atrophy is generally compensated by the normal kidney on the opposite side, and different causes of renal atrophy have different prognostic effects. The causes of renal atrophy are complex and varied. The causes of renal atrophy include congenital diseases and secondary renal atrophy. 1. Congenital diseases (e.g. congenital renal dysplasia, Alport syndrome, etc.) cause renal atrophy, which is mainly treated by surgery and renal replacement therapy, and the prognosis is often poor. 2. For mild renal atrophy caused by secondary diseases (e.g. chronic pyelonephritis, prolonged urinary tract obstruction, renal artery thrombosis, etc.), active treatment (e.g. relief of obstruction, anti-infection treatment, etc.) can restore renal function to different degrees, and the prognosis is often better. The prognosis for patients with renal atrophy is not generalized due to individual differences and different etiologies, and there is no absolute best, fastest and most effective medication. It is recommended that patients go to regular hospitals in time for treatment and strive for early recovery.