Kidneys help remove excess fluid from the body.
When they are not functioning properly, fluid may accumulate in tissues, causing:
- Swollen feet
- Puffy ankles
- Leg swelling
- Tight shoes or socks
Swelling may worsen later in the day.
3. Changes in Urination
Urine changes are among the most important kidney warning signs.
Possible symptoms include:
- Frequent urination
- Reduced urination
- Foamy urine
- Blood in urine
- Dark urine
- Waking often at night to urinate
Healthy kidneys directly regulate urine production.
4. Puffiness Around the Eyes
Persistent puffiness near the eyes may occur when damaged kidneys leak protein into urine.
Protein loss may contribute to:
- Swollen eyelids
- Puffy facial appearance
- Morning swelling around the eyes
5. Dry and Itchy Skin
Kidney dysfunction may affect:
- Mineral balance
- Fluid regulation
- Skin hydration
Some people develop:
- Persistent itching
- Dry skin
- Skin irritation
This symptom becomes more common in advanced kidney disease.
6. Muscle Cramps
Electrolyte imbalances caused by kidney dysfunction may trigger:
- Leg cramps
- Muscle twitching
- Tight muscles
- Nighttime cramps
Kidneys help regulate minerals such as:
- Potassium
- Calcium
- Sodium
7. Shortness of Breath
Fluid buildup or anemia linked to kidney disease may contribute to:
- Breathlessness
- Difficulty exercising
- Feeling winded easily
Severe kidney problems may sometimes affect fluid balance in the lungs.
8. Difficulty Concentrating
Waste buildup in the bloodstream may affect mental clarity.
Some people report:
- Brain fog
- Poor focus
- Memory issues
- Mental fatigue
Reduced oxygen delivery due to anemia may also contribute.
9. Persistent Nausea
Kidney dysfunction may sometimes cause:
- Nausea
- Metallic taste in the mouth
- Vomiting
- Reduced appetite
As waste products build up, digestive symptoms may become more noticeable.
10. High Blood Pressure
The kidneys and blood pressure are closely connected.
Kidney problems may:
- Raise blood pressure
- Worsen hypertension control
