A headline like “12 silent symptoms of high creatinine your doctor might miss” is a bit misleading. High creatinine itself often causes no symptoms, especially in the early stages. Creatinine is a waste product filtered by the kidneys, and a blood test is usually needed to detect an abnormal level.
A high creatinine level may suggest that the kidneys are not filtering as well as they should, but it can also be affected by muscle mass, dehydration, intense exercise, certain medications, and diet.
Possible signs that may occur when kidney function is significantly reduced
- Unusual tiredness
- Reduced kidney function can contribute to fatigue and low energy.
- Swelling (edema)
- Fluid buildup may cause swelling in the feet, ankles, legs, or around the eyes.
- Changes in urination
- Urinating more or less than usual
- Increased nighttime urination
- Foamy urine (possible protein leakage)
- Shortness of breath
- Fluid buildup or anemia related to kidney disease can contribute.
- Nausea or loss of appetite
- Waste buildup in advanced kidney disease may affect digestion.
- Itchy skin
- Can occur when waste products accumulate.
- Muscle cramps
- May be related to electrolyte imbalances.
- Difficulty concentrating or confusion
- More likely in advanced kidney problems.
- Dry or pale skin
- Can occur with dehydration or anemia.
- High blood pressure
- Kidney disease and high blood pressure can worsen each other.
- Back or side discomfort
- May occur with some kidney conditions, though it is not specific to high creatinine.
- Metallic taste or bad breath
- Can occur in advanced kidney failure due to buildup of waste products.
Important: symptoms are not enough to diagnose kidney problems
A person can have kidney disease with few or no symptoms. Doctors typically look at:
- Blood creatinine
- eGFR (estimated glomerular filtration rate)
- Urine tests for protein or blood
- Blood pressure and medical history
Seek medical advice if you have:
- A rapidly rising creatinine level
- Very little urine output
- Severe swelling
- Chest pain or severe shortness of breath
- Confusion or extreme weakness
