A headline like “23 Strange Signs Your Kidneys Might Be in Trouble” refers to possible warning signs of kidney problems. Many kidney conditions develop gradually, and early symptoms can be subtle. Having one of these signs does not necessarily mean your kidneys are failing, but persistent or concerning symptoms deserve medical attention.
Possible signs associated with kidney problems include:
- Changes in how often you urinate
- Urinating more often at night
- Foamy or unusually bubbly urine (possible protein leakage)
- Blood in the urine
- Dark, cloudy, or unusual urine changes
- Swelling in the feet, ankles, hands, or around the eyes
- Persistent fatigue or weakness
- Difficulty concentrating or feeling mentally “foggy”
- Loss of appetite
- Nausea or vomiting
- Itchy skin
- Dry or unusually irritated skin
- Muscle cramps
- Shortness of breath (from fluid buildup or anemia)
- High blood pressure
- Back or side pain in some kidney conditions
- Unexplained weight changes
- Sleep problems
- Metallic taste in the mouth
- Bad breath with a chemical-like smell
- Feeling cold more often (sometimes related to anemia)
- Persistent thirst
- General decline in well-being
Common risk factors for kidney disease
- Diabetes
- High blood pressure
- Family history of kidney disease
- Older age
- Heart disease
- Certain medications (especially long-term or excessive use of some pain relievers)
- Recurrent kidney infections or stones
How kidney health is checked
Doctors commonly use:
- Blood tests (such as creatinine and estimated kidney filtration rate/eGFR)
- Urine tests (checking protein, blood, or other markers)
- Blood pressure measurements
Seek medical advice promptly if you notice blood in urine, sudden swelling, severe weakness, chest pain, severe shortness of breath, or a major change in urination.
Many kidney problems can be slowed or managed when found early, so regular checkups are especially important for people with risk factors.
