Weak positive urine protein in a 16-year-old boy many times may be seen in nephritis, nutcracker phenomenon, functional proteinuria during growth or hereditary nephropathy.
1. Nephritis: proteinuria, hematuria, especially after upper respiratory tract infections, IgA nephropathy and other chronic nephritis is common in adolescents.
2. Nutcracker phenomenon: most common in tall and thin adolescents, manifested as hematuria, proteinuria, ultrasound or angiography shows that the left renal vein is abdominal aortic compression.
3. Functional proteinuria: common in fever, exercise, acute diseases and other conditions, but proteinuria caused by these conditions is often transient; if many times proteinuria can also be seen in upright proteinuria, urinary protein disappears after lying down.
4. Hereditary kidney disease: such as Alport syndrome, proteinuria can occur, often with vision and hearing loss. There is often a family history of such diseases.
In addition to the above, it can also be seen in interstitial nephropathy, drug poisoning caused by kidney injury, etc. It is recommended to consult the nephrology department in time, further examination to clarify the cause of the disease, and follow the doctor’s instructions for treatment.