There are many different symptoms of proteinuria, and it also depends on what causes proteinuria. If the proteinuria is caused by chronic nephritis, there may be lower limb edema, hypertension, and puffy eyelids. If the proteinuria is caused by primary nephrotic syndrome, primary nephropathy, the most important symptom is the obvious swelling of the whole body. This is because, after hypoproteinemia, water goes from the blood to the tissue interstices. After the appearance of proteinuria, it often indicates that there is damage to the kidneys, and then we should actively treat it. First, identify the causes of proteinuria; second, apply medications to address these causes. If it is a primary nephrotic syndrome, hormones or immunosuppressants will be used for treatment; if it is a simple chronic nephritis or anaplastic glomerulonephritis that causes proteinuria, simply using some drugs to protect the kidney and reduce urine protein will be fine. There are also some secondary factors, such as hypertension and diabetes, which can also cause proteinuria, and the treatment plan is also to use drugs to protect the kidneys, control blood pressure and blood sugar, and reduce proteinuria.