Pay attention to the early warning signs your body may be sending so you can take action and seek timely medical examination and treatment.

1. Colorless Morning Urine – A Sign of Abnormal Kidney Function

Normally, after a long night without food or drink, a healthy person’s first urine in the morning should be dark yellow because it is concentrated.

If you often notice that your urine is clear and colorless in the morning, this is no longer a normal sign.

Colorless morning urine may indicate that your kidneys are not properly concentrating urine. This can be a sign of diabetes insipidus or damage to the renal tubules, which reduces the kidney’s ability to reabsorb water.

If this condition persists, it can lead to electrolyte imbalances, dehydration, and impaired kidney function. Therefore, if your urine remains clear for many days, you should visit a medical facility for an early kidney function test.

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2. Foamy Morning Urine – A Warning Sign That the Kidneys Are “Leaking” Protein

Another warning sign to pay attention to is foamy urine, especially if the foam is abundant and takes a long time to disappear.

A small amount of foam caused by a strong urine stream is normal. However, if you notice persistent foamy urine, especially in the morning, and the foam doesn’t dissipate after a few minutes, this is an abnormal sign.

The most common cause is kidney damage, particularly damage to the glomerular membrane, which allows protein to leak into the urine. In medicine, this condition is called proteinuria.

If proteinuria is not detected and treated early, it can silently damage kidney function, leading to complications such as swelling (edema), high blood pressure, and chronic kidney failure.

If you notice persistent foamy urine, you should undergo a 24-hour urine test and check your urinary protein levels to determine the proper treatment.

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3. Frequent Nighttime Urination in Young People – Don’t Ignore It

Nocturia (frequent urination at night) is common among the elderly due to aging, which reduces the kidneys’ ability to concentrate urine overnight.

However, in young people, if you do not take diuretics or drink a lot of water in the evening but still urinate more than twice a night, you should suspect kidney function abnormalities or endocrine disorders.

Possible causes include early-stage kidney failure, diabetes, bladder dysfunction, urinary tract infections, or tubular damage.

If nighttime urination continues for several days and affects your sleep quality, you should visit a Nephrology–Urology specialist to identify the cause and receive timely intervention.

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The kidneys play a vital role in maintaining internal balance, filtering blood, and excreting toxins. However, kidney damage often develops silently and is usually detected only when it has reached an advanced stage.

Therefore, paying attention to even small changes in your body—especially in your urine, which acts as a “mirror” reflecting kidney health—is extremely important.

If you frequently experience any of the following signs: colorless morning urine, persistent foamy urine, or frequent nighttime urination at a young age, do not delay—get your kidney function checked as soon as possible.

Protecting your kidneys means protecting not only your urinary system but also your overall quality of life.