What causes black urine?

When the urine is black, many people are afraid, because sometimes it may be caused by some diseases in the body. Usually, if the urine is black, it may be a patient with acute intravascular hemolysis or people with malignant malaria.

1. Colorless urine: It may be a sign of diabetes, chronic interstitial nephritis, or diabetes insipidus. If it is not caused by drinking too much water, you should be careful to identify it.

2. White urine: It looks like milk, sometimes mixed with white clots or blood, indicating that there is chyle in the urine, which comes from filariasis or blockage of the kidneys or lymphatic vessels.

3. Soy sauce urine: It is caused by the massive destruction of red blood cells in the urine. It may also be acute nephritis, acute icteric hepatitis and hemolytic jaundice.

4. Red urine: It indicates that there may be an excess of red blood cells in the urine, also known as "hematuria", which is mostly caused by kidney disease, stones, prostatitis, bladder tumors, etc. If severe low back pain occurs accompanied by hematuria, it is most likely caused by stones, such as kidney stones, ureteral stones, etc.

5. Salt urine: It often occurs in children in winter. The urine is rice-soup-like and contains a large amount of phosphate or urinary hydrochloric acid. It is easy to precipitate after being left. If the urine is placed in a bottle and heated, it will immediately become clear. Salt urine is a normal physiological phenomenon. It can be cured without medication, the key is to drink more boiled water.

6. Blue urine: can be seen in cholera, typhus, primary hypercalcemia, and vitamin D poisoning. But this color of urine is mostly related to medication, not caused by disease. It may occur after taking the diuretic triamterene, injecting methylene blue, or taking methylene blue, indigo carmine, creosote, or salicylic acid. It will disappear upon stopping the medication. This blue urine caused by medication is a normal phenomenon and there is no need to worry too much.

7. Green urine: occurs when Pseudomonas aeruginosa grows in the urine, or when bilirubinuria is left for too long and oxidized into biliverdin.

8. Black urine: Black urine is relatively rare and often occurs in patients with acute intravascular hemolysis, such as patients with malignant malaria. It is medically known as blackwater fever, which is one of the most serious complications of malignant malaria.