23 “Strange” Signs Your Kidneys Might Be in Trouble
The headline is a little sensational. Kidney disease often causes no noticeable symptoms in its early stages, so symptoms alone aren’t a reliable way to detect it. Blood and urine testing are much more useful.
Possible signs of kidney problems include:
- Foamy or unusually bubbly urine — may indicate excess protein in the urine.
- Blood in the urine — pink, red, or cola-colored urine should be evaluated.
- Urinating more often, particularly at night.
- Urinating much less than usual.
- Swollen ankles or feet from fluid retention.
- Puffiness around the eyes, especially in the morning.
- Unexplained fatigue or weakness.
- Difficulty concentrating or “brain fog.”
- Persistent itching without an obvious skin cause.
- Very dry or itchy skin.
- Muscle cramps or twitching.
- Nausea or vomiting.
- Poor appetite.
- Unusual or metallic taste in the mouth.
- Bad or ammonia-like breath.
- Unexplained weight changes, particularly rapid weight gain from fluid.
- Shortness of breath, especially with significant fluid buildup.
- New or difficult-to-control high blood pressure.
- Pale skin, which can occur with anemia associated with advanced kidney disease.
- Headaches or dizziness, sometimes related to anemia or uncontrolled blood pressure.
- Pain in the side or back, depending on the underlying kidney condition.
- Fever, chills, and painful urination, which can occur with a kidney infection.
- Persistent changes in urine appearance or odor.
Don’t try to diagnose kidney disease from symptoms alone
Many of these symptoms have other explanations. For example, swollen legs can result from heart or vein problems, while fatigue has numerous possible causes.
If you’re concerned, common kidney checks include a blood creatinine/eGFR test and a urine albumin-to-creatinine ratio (uACR). People with diabetes or high blood pressure should discuss regular kidney screening with their healthcare professional.
🚨 Seek urgent medical care for very little or no urine, severe breathing difficulty, severe confusion, or significant blood in the urine—especially when accompanied by pain or illness.
