Understanding and recognizing the signs of kidney disease can help you take control of your health early, prevent complications, and reduce the risk of serious outcomes.

In many cases, people with early-stage kidney disease are completely unaware that their kidneys are having problems. This is because the symptoms of kidney disease in its early stages are often subtle and can easily be mistaken for other health issues.

Moreover, many people only develop noticeable symptoms in the later stages, when kidney function has already declined significantly or when large amounts of protein begin appearing in the urine. This is one reason why studies estimate that only about 10% of people with chronic kidney disease are aware of their condition.

10 Common Signs of Kidney Disease

The only reliable way to determine whether you have kidney disease is through kidney function testing. Experts recommend annual kidney screenings for people who:

• Are 60 years old or older
• Have high blood pressure or diabetes
• Have a family history of kidney failure or kidney disease

In addition, you should pay attention to your health if you notice any of the following warning signs.

1. Fatigue, Weakness, or Difficulty Concentrating

Persistent fatigue and difficulty concentrating are common signs of kidney problems.

When kidney function declines significantly, toxins and waste products can build up in the bloodstream. This can reduce the amount of oxygen and nutrients delivered by red blood cells, leaving other cells without sufficient energy to function properly.

As a result, many people with kidney disease also develop anemia, leading to ongoing weakness and exhaustion.

2. Difficulty Sleeping

When the kidneys cannot effectively filter waste from the blood, toxins remain in the body instead of being eliminated through urine.

This buildup may contribute to sleep problems.

Researchers have also found links between obesity, chronic kidney disease, and sleep apnea, a condition that is more common among people with kidney problems.

3. Dry and Itchy Skin

Healthy kidneys perform many important functions, including:

• Removing toxins and waste
• Eliminating excess fluids
• Supporting red blood cell production
• Maintaining bone health
• Regulating mineral levels in the blood

Dry, itchy skin may indicate that the kidneys are no longer maintaining the proper balance of minerals and nutrients, which can lead to bone and mineral disorders that affect the skin.

4. Frequent Urination

A sudden increase in the urge to urinate—especially at night—can be a sign of kidney disease.

Damage to the kidneys' filtering units may trigger more frequent urination.

In some cases, frequent urination can also indicate a urinary tract infection or an enlarged prostate in men.

5. Blood in the Urine

Blood in the urine is another important warning sign.

Healthy kidneys normally prevent red blood cells from passing into the urine. When the kidneys are damaged, red blood cells may leak into the urine and be expelled from the body.

In addition to kidney disease, blood in the urine may also be associated with:

• Kidney cancer
• Kidney stones
• Kidney infections

6. Foamy Urine

Excessively foamy urine may indicate the presence of protein in the urine.

Experts often compare this foam to the bubbles that appear when beating egg whites.

Normally, urine contains little to no protein. If protein is present, it may suggest that the kidneys' filtering system is not functioning properly.

7. Persistent Puffiness Around the Eyes

Protein leaking into the urine can indicate damage to the kidneys' filters.

The resulting loss of protein may cause puffiness around the eyes that lasts for several days.

8. Swollen Ankles or Feet

Reduced kidney function can lead to sodium retention, causing fluid to accumulate in the lower limbs.

This may result in swelling of the ankles, feet, or legs.

However, lower-body swelling can also be associated with heart disease, liver disease, or chronic vein disorders.

9. Loss of Appetite

A buildup of toxins in the body due to impaired kidney function may contribute to reduced appetite and decreased interest in food.

10. Muscle Cramps

Kidney disease can cause electrolyte imbalances.

Low calcium levels or poorly controlled phosphorus levels may contribute to frequent muscle cramps.

Outlook for People with Kidney Disease

Kidney disease symptoms often remain vague or unnoticed until the condition becomes more advanced, such as in cases of kidney failure.

For this reason, doctors strongly encourage routine kidney health screenings, especially for people with risk factors.

Most people with kidney disease can successfully manage their condition with appropriate medications and lifestyle adjustments. Research suggests that only a small proportion of cases progress to kidney failure.

In recent years, kidney disease has become one of the leading causes of serious health complications worldwide. Recognizing the warning signs early can help ensure timely diagnosis and more effective treatment.

Important Note

The symptoms listed above can be associated with many different medical conditions, not just kidney disease. If you experience any of these signs, consult a healthcare professional for proper evaluation rather than self-diagnosing. Early testing and medical advice are the best ways to protect your kidney health.