Some people with more advanced kidney problems describe:
* brain fog
* difficulty focusing
* reduced alertness
* problems remembering things
These symptoms are nonspecific and can also be caused by stress, poor sleep, medications, or many other conditions.
## 3. Swollen Ankles and Feet
The kidneys help control sodium and fluid levels.
When kidney function declines, excess fluid may collect in the tissues, causing swelling in the:
* feet
* ankles
* lower legs
* hands
* sometimes the face
Swelling can also be caused by heart, liver, vein, or circulation problems.
## 4. Puffy Eyes in the Morning
Persistent puffiness around the eyes can sometimes occur when protein leaks into the urine.
Occasional morning puffiness may simply result from sleep, allergies, or salt intake, but repeated swelling deserves attention.
## 5. Foamy Urine
A few bubbles in urine are normal.
However, urine that is consistently very foamy may sometimes indicate protein in the urine.
This is one of the changes healthcare professionals can check with a simple urine test.
## 6. Blood in the Urine
Visible blood in the urine should always be medically evaluated.
Possible causes include:
* urinary tract infections
* kidney stones
* prostate problems
* kidney disease
* other conditions affecting the urinary system
It does not automatically mean kidney failure, but it should not be ignored.
## 7. Urinating More Often at Night
Some people with kidney problems notice they need to get up repeatedly during the night to urinate.
However, nighttime urination may also be caused by:
* diabetes
* prostate enlargement
* medications
* sleep disorders
* drinking large amounts of fluid before bed
## 8. Urinating Less Than Usual
