The diagnosis of nephropathy or nephritis can generally be made based on the patient’s clinical manifestations and laboratory tests, but due to limited medical care, the diagnosis of nephropathy is often very general. A certain kidney disease may be divided into several types and may contain other diseases. Clarifying its type can help clarify the diagnosis, guide the treatment, and help doctors judge the long-term prognosis of patients. It is like a box of apples placed in front of you, you can tell it is a box of apples by the smell emitted from the box, but you may not know what the variety of apples is, the conditions in which this box of apples should be stored may not be good to judge, and you do not know how long this box of apples can be stored. You can use a small hook to remove a little bit of the apple skin out, which is a little bit of a sacrifice, but can be effective for the whole box of apples. This is also true for kidney puncture biopsies.