Proteinuria(++) with normal renal function, whether it is serious or not depends on whether the proteinuria is persistent or not, and the cause of proteinuria. First of all, if it is transient proteinuria, such as proteinuria caused by strenuous exercise or infection, such patients often after a period of time, proteinuria can be relieved by themselves, so it is not very serious, if it is persistent proteinuria, especially persistent large amount of proteinuria will eventually cause renal function damage, and even kidney failure, which is relatively more serious. Secondly, according to the cause of proteinuria, proteinuria caused by acute glomerulonephritis is not very serious because the disease is self-limiting. If it is like tumor-related kidney disease caused by proteinuria, or like diabetic nephropathy caused by proteinuria, proteinuria is often not easy to control, the original disease is relatively serious, but also to actively pay attention to.