Uremia
What is Uremia?
Uremia is a serious condition that happens when your kidneys can no longer filter waste from your blood. When kidneys fail, toxic waste products build up in your bloodstream. These toxins affect almost every system in your body.
The term uremia comes from urea, a waste product your body makes when it breaks down protein. In healthy kidneys, urea gets filtered out and leaves your body through urine. When kidneys stop working properly, urea and other toxins accumulate to dangerous levels. This buildup causes a collection of symptoms called uremic syndrome.
Uremia is not a standalone disease. It is a complication of advanced kidney failure, also called end-stage renal disease. Without treatment, uremia can be life threatening. Early detection through blood testing helps doctors intervene before complications become severe.
Symptoms
Symptoms of uremia develop gradually as toxins build up in your blood. Common signs include:
- Nausea and vomiting that gets worse over time
- Loss of appetite and unintended weight loss
- Extreme fatigue and weakness
- Confusion, difficulty concentrating, or memory problems
- Itching all over the body that is hard to relieve
- Swelling in the legs, ankles, or feet
- Shortness of breath or difficulty breathing
- Chest pain, especially when breathing deeply
- Unusual bleeding or bruising easily
- Metallic taste in the mouth or bad breath
Some people with early kidney disease have no symptoms at all. By the time uremia develops, kidney function is already severely reduced. Regular blood testing can catch rising toxin levels before you feel sick.
Concerned about Uremia? Check your levels.
Screen for 1,200+ health conditions
Causes and risk factors
Uremia develops when chronic kidney disease progresses to kidney failure. Any condition that damages the kidneys over time can eventually lead to uremia. The most common causes include diabetes, which damages small blood vessels in the kidneys, and high blood pressure, which strains kidney tissue. Other causes include autoimmune diseases like lupus, chronic urinary tract infections, kidney stones, and inherited kidney disorders like polycystic kidney disease.
Risk factors for developing uremia include poorly controlled diabetes, unmanaged high blood pressure, heart disease, obesity, smoking, family history of kidney disease, and being over age 60. Certain medications can also harm the kidneys when used long term, including nonsteroidal anti-inflammatory drugs or NSAIDs. The more risk factors you have, the higher your chance of developing kidney disease that could progress to uremia.
How it's diagnosed
Uremia is diagnosed through blood tests that measure waste products in your bloodstream. The most important test is Blood Urea Nitrogen, or BUN, which measures how much urea is in your blood. Normal BUN levels range from 7 to 20 milligrams per deciliter. When BUN rises above 80 to 100 milligrams per deciliter, uremic syndrome typically develops. Your doctor will also check creatinine levels and calculate your glomerular filtration rate, or GFR, to assess how well your kidneys are filtering waste.
Rite Aid offers Blood Urea Nitrogen testing as part of our flagship health panel. With over 2,000 Quest Diagnostics locations nationwide, you can get tested conveniently and track your kidney function over time. Early detection of rising BUN levels allows for intervention before uremia develops. If you have risk factors for kidney disease, regular testing helps you and your doctor stay ahead of potential problems.
Treatment options
Treatment for uremia focuses on removing toxins from your blood and managing symptoms. Common approaches include:
- Dialysis to filter waste products from your blood when kidneys can no longer do so
- Kidney transplant for eligible patients with end-stage renal disease
- Medications to control blood pressure and reduce protein in urine
- Dietary changes including low-protein, low-sodium, and low-potassium diets
- Fluid restriction to prevent dangerous fluid buildup
- Phosphate binders to prevent bone disease
- Medications to treat anemia caused by kidney failure
- Treatment of underlying conditions like diabetes or high blood pressure
If you have symptoms of uremia, seek medical attention immediately. This is a medical emergency that requires urgent care. Your doctor will determine whether you need dialysis right away based on your blood test results and symptoms. Earlier stages of kidney disease can often be managed with lifestyle changes and medications to slow progression.
Concerned about Uremia? Get tested at Rite Aid.
- Simple blood draw at your nearest lab
- Results in days, not weeks
- Share results with your doctor
Frequently asked questions
Kidney disease is a broad term for any condition that damages your kidneys. Uremia is a specific complication that happens when kidney disease progresses to kidney failure. Not everyone with kidney disease will develop uremia. Uremia only occurs when kidneys lose most of their filtering ability and toxins build up to dangerous levels in your blood.
Uremia usually develops gradually over months or years as chronic kidney disease worsens. In some cases, acute kidney injury can cause uremia to develop within days or weeks. The speed depends on what is causing your kidney failure and how quickly kidney function declines. Regular blood testing helps catch rising toxin levels early.
Uremia itself cannot be reversed because it indicates severe kidney damage. However, dialysis can remove toxins from your blood and relieve symptoms. In some cases, treating the underlying cause of kidney failure may slow or stop further decline. A kidney transplant can restore normal kidney function and eliminate uremia completely.
Uremia typically develops when Blood Urea Nitrogen levels rise above 80 to 100 milligrams per deciliter. Normal BUN levels range from 7 to 20 milligrams per deciliter. As BUN climbs higher, symptoms become more severe. Your doctor will look at BUN along with other kidney function tests to diagnose uremia and decide on treatment.
Uremia itself does not usually cause direct pain. However, complications can be painful. Pericarditis, which is inflammation around the heart, causes chest pain that worsens with breathing. Nerve damage from uremia can cause tingling or burning sensations. Itching can be severe and distressing. Most discomfort comes from the overall sick feeling and symptoms like nausea and fatigue.
Testing frequency depends on your stage of kidney disease. Early stages may need testing every 6 to 12 months. More advanced stages require testing every 3 months or more often. Your doctor will recommend a testing schedule based on your kidney function and other health conditions. Regular monitoring helps catch problems before they become emergencies.
Diet changes cannot prevent uremia once kidneys are severely damaged. However, a kidney-friendly diet can slow the progression of early kidney disease. Limiting protein, sodium, and potassium reduces the workload on your kidneys. These changes may delay or prevent the progression to kidney failure and uremia. Work with a dietitian who specializes in kidney disease.
Untreated uremia is life threatening. Toxins continue building up and affect your heart, brain, and other organs. Complications include heart failure, seizures, coma, and death. Fluid buildup in the lungs makes breathing difficult. Without dialysis or a kidney transplant, uremia will be fatal. Seek immediate medical care if you have symptoms.
No, high BUN does not always mean uremia. BUN can rise temporarily due to dehydration, high-protein diets, or certain medications. Uremia requires both very high BUN levels and symptoms of toxin buildup. Your doctor will look at your BUN along with creatinine, symptoms, and other tests to diagnose uremia.
Most people with uremia cannot work during active treatment because symptoms are severe. Dialysis is time consuming and takes 3 to 4 hours three times per week. Fatigue and other symptoms make it difficult to maintain regular work. After a successful kidney transplant, many people return to normal activities including work. Talk to your doctor about your specific situation.