Blood in the urine with severe pain
* Inability to urinate
* Very dark urine with severe muscle pain
* Jaundice with dark urine
* Severe dehydration with confusion or fainting
* Fever and flank pain
## The Bottom Line
Urine color can provide useful clues, but it should never be used as a diagnosis by itself.
Most color changes come from **hydration, diet, vitamins, or medications**. More concerning changes include **persistent red, brown, orange, or unusually cloudy urine**, particularly when accompanied by pain, fever, jaundice, swelling, or changes in urination.
The safest rule is simple:
