What causes dark urine? 40 possible conditions
Dark urine is urine that is a deeper color rather than the usual straw to yellow color. Darker urine is usually brown, deep yellow, or maroon.
Urine looks dark.
Urine is produced in the kidneys, which are important organs for the health of our body. When we take fluid in, it passes from our digestive system into our circulatory system, where it is filtered through the kidneys. The kidneys get rid of waste products through the urine. The ureters are tubes that connect the kidneys to the bladder. The bladder empties the urine via the urethra, the tube through which we urinate.
Dark urine is most commonly due to dehydration and concentrated urine. However, it may be an indicator that excess, unusual, or potentially dangerous waste products are circulating in the body. For example, dark brown urine may indicate liver disease due to the presence of bile products. Bloody (reddened) urine is an indication of many other potential problems, including direct injury to the kidneys.
Associated conditions and diagnoses include:
- biliary obstruction
- bladder stones
- bladder cancer
- liver disease
- kidney cancer
- pancreatic cancer
- side effects of blood-thinning medications
- bladder or kidney stones
A comprehensive evaluation by your doctor, including a detailed history, physical examination, and urinalysis will be necessary when dark urine is present. Treatment will depend on your medical history, symptoms, and the results of any laboratory studies and other diagnostic tests.
Any change in the color of the urine not due to eating certain foods or taking certain medications should be reported to your doctor. Report blood in the urine to your doctor immediately.
See a list of possible causes in order from the most common to the least.
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