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Understanding Chronic Kidney Disease: Causes, Symptoms, and Importance of Early Detection

Chronic kidney disease (CKD) affects millions globally and is projected to become a leading cause of death by 2040. This article delves into the nature of CKD, its causes, and the critical importance of early detection. With many individuals unaware of their condition until it is advanced, understanding the symptoms and risk factors is essential for timely intervention. Learn more about how CKD impacts kidney function and the steps you can take to safeguard your health.
By Narendra Chaudhary Jun 3, 2026, 15:03 IST

The Global Impact of Chronic Kidney Disease

Currently, an estimated 788 to 844 million adults worldwide are affected by chronic kidney disease (CKD), which ranks among the top causes of death. A recent series published in The Lancet indicates that CKD is expected to rise to the fifth leading cause of mortality by the year 2040. One of the most alarming aspects of this disease is its often asymptomatic nature in the early stages, leading many individuals to discover their condition only when it has progressed significantly. The World Health Organization emphasizes the importance of early screening and diagnosis, as kidney disease frequently shows no symptoms initially.


Defining Chronic Kidney Disease

Chronic kidney disease refers to the gradual damage to the kidneys, impairing their ability to function effectively. The kidneys act as filters, removing waste, toxins, and excess fluids from the bloodstream, while also playing a role in maintaining bone health and producing red blood cells. As kidney function declines, waste accumulates in the blood, leading to serious health issues. CKD is termed 'chronic' because the deterioration of kidney function occurs over an extended period. While not everyone with CKD will experience kidney failure, the condition typically worsens without appropriate treatment, and there is currently no cure for it.


Causes of Chronic Kidney Disease

Chronic kidney disease arises when the kidneys sustain damage that hinders their ability to filter blood effectively. This damage often develops over several years and can be attributed to various factors, including:

  • Glomerulonephritis: A condition that harms the glomeruli, the filtering units within the kidneys.
  • Polycystic kidney disease: A genetic disorder characterized by the growth of numerous fluid-filled cysts in the kidneys, impairing their function.
  • Membranous nephropathy: An autoimmune disorder where the immune system attacks the membranes responsible for waste filtration in the kidneys.
  • Kidney stones: Blockages in the urinary tract caused by stones.
  • Nephrotic syndrome: A collection of symptoms indicating kidney damage.
  • Diabetes-related nephropathy: Damage to the kidneys resulting from diabetes-related nerve dysfunction.


Recognizing Symptoms of Chronic Kidney Disease

In the early stages, chronic kidney disease may not present any noticeable symptoms. However, as the condition progresses, individuals may experience a range of symptoms, including:
  • Increased frequency of urination
  • Fatigue, weakness, and low energy
  • Decreased appetite
  • Swelling in the hands, feet, and ankles
  • Shortness of breath
  • Foamy or bubbly urine
  • Puffy eyes
  • Dry, itchy skin
  • Difficulties with concentration
  • Sleep disturbances
  • Numbness
  • Nausea or vomiting
  • Muscle cramps
  • Elevated blood pressure
  • Skin darkening