Dark urine : what does it mean, what tests should be done?

Dark Urine – What Does it Mean?

Dark urine can be an indicator of several underlying health issues. The color of urine is influenced by the presence of different pigments or chemical compounds. Below are some possible causes of dark urine and the medical tests that may be done:

1. Dehydration: Dehydration is the primary cause of dark urine. If you are not consuming enough water or fluids, your urine color may appear darker than usual. To test for dehydration, a urine specific gravity test may be performed.
2. Bilirubin: If there is an excess of bilirubin in your body, your urine may become dark. This could be due to liver disease or hemolysis (red blood cell destruction). A bilirubin blood test is used to detect bilirubin levels.
3. Liver Function Issues: Liver disease or hepatitis can cause dark urine due to the excess bilirubin in the urine. Blood tests such as alanine aminotransferase (ALT) and aspartate aminotransferase (AST) can evaluate liver function.
4. Medication: Some medications can cause dark urine due to their chemical makeup. If this is suspected, the doctor may review all medications being taken.
5. Kidney Issues: Certain kidney problems can cause dark urine and may be associated with other symptoms such as pain in the sides or back, fever and vomiting.

Blue, Green, White Urine – Causes

While less common than dark urine, blue, green or white urine can also indicate a health issue. Here are some of the causes:

1. Pseudomonas Infection: If bacteria Pseudomonas aeruginosa is present in the urinary tract, it can give urine an intense green color.
2. Medications: Certain medications such as amitriptyline and indomethacin can cause blue or green discoloration of urine.
3. Genetic Conditions: Some rare genetic disorders can cause blue or green urine, particularly in children.
4. Urinary Tract Infections: Certain bacterial infections of the urinary tract can give urine a cloudy or milky appearance.