The normal kidney size of an adult human is about 10 to 13 cm (4 to 5 inches) long and about 5 to 7.5 cm (2 to 3 inches) wide.
Some important causes of small kidney include - congenital hypoplastic kidneys, reflux nephropathy, acute pyelonephritis, ischemic nephropathy, or glomerulonephropathies.
To know the cause of your small kidneys, you may need to undergo a few tests include - urinalysis, blood tests, X rays and ultrasound of the kidneys.
Depending on the cause of your condition, the presentation and symptoms will vary. If one kidney is small and the other one is completely normal, it is usually possible to lead a normal life without problems. However, if both kidneys are small, there may be kidney failure. Also, the one small kidney can cause problems such as high blood pressure, even if the other kidney is normal.
You might consult with your nephrologist for proper evaluation and specific advice.
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