Dark Urine
Dark urine is most often a sign of dehydration, but it can also signal liver disease, blood in the urine, or other conditions. Color and timing offer important clues.
Table of Contents
Quick Facts
- ICD-10: R82.99
Common Causes
- Dehydration (concentrated urine)
- Liver disease — tea or cola-colored urine, often with jaundice
- Blood in urine (urinary infection, stones, kidney disease, cancer)
- Muscle breakdown (rhabdomyolysis)
- Hemolysis (red blood cell breakdown)
- Medications (rifampin, phenazopyridine, some chemotherapy)
- Foods (beets, blackberries, fava beans)
When to See a Doctor
- Persistent dark urine despite hydration
- Yellowing of skin or eyes
- Pain or burning with urination
- Back or abdominal pain
- Cola or tea-colored urine (especially after intense exercise)
Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about a medical condition. If you are experiencing a medical emergency, call your local emergency number immediately.
References
- Mayo Clinic. Urine Color Resources.