Diabetes and high blood pressure together cause roughly three out of every four cases of end stage renal disease (ESRD) in the United States. In 2023, over 131,000 Americans began treatment for kidney failure, and the vast majority arrived there through one of a handful of preventable or manageable conditions. Understanding what drives kidneys to fail completely can help you recognize risks years before they become irreversible.
Diabetes Is the Single Largest Cause
Diabetes accounts for 45% of all new kidney failure cases. When blood sugar stays elevated over years, it triggers a chain of damage inside the kidneys that builds on itself. High glucose forces the kidneys’ tiny filtering units, called glomeruli, to work harder than normal. This hyperfiltration raises pressure inside the kidney’s blood vessels and gradually wears them out.
The damage goes deeper than just overwork. Chronically high blood sugar strips away a protective gel layer that lines the inside of blood vessels in the kidneys. Once that barrier is gone, the filtering capillaries become leaky, allowing protein to spill into urine, one of the earliest detectable signs of diabetic kidney disease. At the same time, high glucose triggers lasting chemical changes to DNA that keep inflammatory and scarring genes switched on long after a blood sugar spike has passed. This is why kidney damage can continue progressing even after someone improves their glucose control: the molecular memory of past high blood sugar lingers.
Oxidative stress accelerates the process further. Damaged blood vessel walls become more permeable, scar tissue replaces functional kidney tissue, and filtering capacity drops year by year. For many people with poorly controlled diabetes, this progression unfolds over 10 to 20 years before reaching the point where dialysis or transplant becomes necessary.
High Blood Pressure and Kidney Damage
Hypertension is the second leading cause, responsible for about 29% of new ESRD cases. The kidneys depend on an intricate network of tiny blood vessels to filter waste from the blood. When blood pressure stays high for years, it damages these small arteries, the glomeruli, the tubules that reabsorb useful substances, and the tissue between them. The result is a condition called nephrosclerosis: progressive scarring that slowly chokes off the kidney’s ability to function.
What makes hypertension particularly dangerous for kidneys is the feedback loop it creates. Damaged kidneys lose the ability to regulate blood pressure effectively, which pushes blood pressure even higher, which causes more kidney damage. Many people with hypertension-related kidney disease don’t experience symptoms until function has dropped significantly, making regular blood pressure management and kidney function monitoring critical for anyone with chronic hypertension.
Glomerulonephritis and Autoimmune Conditions
Glomerulonephritis, inflammation of the kidney’s filtering units, accounts for about 6.4% of new ESRD cases. This category includes several distinct diseases that all share a common endpoint: the glomeruli become inflamed, scarred, and eventually unable to filter blood properly.
IgA nephropathy is one of the most common forms, caused by deposits of an immune protein that trigger inflammation in the glomeruli. Lupus nephritis occurs when the immune system attacks kidney tissue as part of systemic lupus. Goodpasture syndrome targets both lungs and kidneys with antibodies that attack the basement membrane of blood vessels. Membranoproliferative glomerulonephritis thickens and scars the filtering membranes themselves. Each condition has a different trigger, but when chronic or rapidly progressive, any of them can lead to kidney failure.
Polycystic Kidney Disease
Cystic kidney diseases cause about 2.7% of new ESRD cases, and the most common form is autosomal dominant polycystic kidney disease (ADPKD). This genetic condition causes fluid-filled cysts to grow throughout both kidneys, gradually enlarging them and destroying functional tissue.
The timeline depends heavily on which gene is affected. People with a mutation in the PKD1 gene, the more common variant, typically reach kidney failure around age 55. Those with a PKD2 mutation progress more slowly, with kidney failure occurring around age 74 on average. A rarer and more severe genetic combination can cause kidney failure in childhood or adolescence. Because the disease is inherited in a dominant pattern, only one copy of the mutated gene from one parent is enough to cause it, giving each child of an affected parent a 50% chance of inheriting the condition.
Urinary Tract Blockages
When urine can’t drain properly, it backs up into the kidneys, causing them to swell in a condition called hydronephrosis. Over time, the sustained pressure destroys kidney tissue. The most common causes of these blockages include kidney stones, an enlarged prostate (benign prostatic hyperplasia), scarring in the ureters or urethra, and nerve damage affecting bladder muscles.
Cancers in or near the urinary tract can also create obstructions. Bladder, prostate, cervical, colon, ovarian, and uterine cancers can all compress or invade the structures that carry urine from the kidneys. When blockages are caught early, restoring urine flow can preserve kidney function. Left untreated, the kidneys can fail permanently.
Medications That Harm the Kidneys
Long-term use of common painkillers, particularly nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen and naproxen, can contribute to chronic kidney disease. A large study of people with hypertension found that taking NSAIDs for 90 days or more increased the risk of developing chronic kidney disease by 32% compared to non-users. Even shorter use, between 1 and 89 days, carried an 18% increased risk. Taking more than one standard daily dose raised risk by 23%.
These risks are most significant for people who already have conditions that stress the kidneys, like high blood pressure or diabetes. NSAIDs reduce blood flow to the kidneys and interfere with their ability to regulate pressure and fluid balance. For occasional use in otherwise healthy people, the risk is low. But daily or near-daily use over months and years, particularly at higher doses, can contribute to gradual kidney damage.
Heavy Metals and Environmental Toxins
Chronic exposure to certain heavy metals causes a distinct pattern of kidney damage. Lead exposure over 5 to 30 years progressively destroys the tubules, the structures that reabsorb water and nutrients, and replaces functional tissue with scar tissue. The result is declining kidney function accompanied by high blood pressure and gout.
Cadmium, which enters the body through contaminated food, water, tobacco smoke, and certain workplace exposures, damages the tubules in a different way. Early signs include proteins and sugars spilling into the urine that normally would be reabsorbed. Mercury and other heavy metals can damage both the tubules and the glomeruli. These exposures are less common causes of ESRD than diabetes or hypertension, but they matter for people with occupational risks or those living in areas with contaminated water supplies.
How These Causes Overlap
In practice, kidney failure rarely results from a single, isolated insult. Someone with diabetes often develops high blood pressure, and both conditions attack the kidneys simultaneously. A person with polycystic kidney disease may also take NSAIDs regularly for the pain their enlarged kidneys cause, compounding genetic damage with drug-related injury. About 4% of new ESRD cases have no identified cause at all, and another 9% fall into an “other” category that includes rarer conditions like chronic infections, sickle cell disease, and amyloidosis.
The kidneys have remarkable reserve capacity. You can lose a significant amount of function before symptoms appear, which is why kidney disease is often called a silent condition. By the time someone reaches ESRD, typically defined as kidney function below about 15% of normal, the damage has usually been accumulating for years or decades. The causes listed above represent the starting points of that long decline, and in most cases, the earlier they’re identified and managed, the longer the kidneys can keep working.