What is the cause of green urine? How to differentiate and diagnose

Many friends find themselves urinating green urine when urinating, which makes people very nervous. In fact, this is mostly caused by taking medicine, so don’t worry too much. This is also a natural reaction to taking medicine. What is the matter with green urine? How to differentiate and diagnose?

It occurs when Pseudomonas aeruginosa grows in the urine, or when bilirubinuria is left for too long and oxidized into biliverdin. Light green urine: seen after taking large amounts of anti-inflammatory drugs. Dark green urine: The cause is the same as blue urine. It 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.

How to make a differential diagnosis

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 and is one of the most serious complications of malignant malaria. The plasma of such patients contains a large amount of free oxygen, hemoglobin and oxyhemoglobin, which are excreted in the urine, causing the urine to be dark red or black. A small number of patients may also experience dark urine after taking levodopa, cresol, phenylhydrazine, etc., which will disappear after stopping the medication. Foreign data reports that patients with paroxysmal myoglobinuria will also excrete brown-black urine after exercise, accompanied by muscle weakness, which may gradually develop into paralysis. In addition, dark urine can also be seen in phenol poisoning, melanoma, and alkaptonuria.

Brown urine (like the color of soy sauce): It can be seen in acute nephritis, acute icteric hepatitis, renal crush injury, large area burns, hemolytic anemia, wrong blood transfusion, and even after strenuous exercise, the urine may be like soy sauce. Sometimes the urine is brown after waking up from sleep, which is a characteristic of paroxysmal nocturnal hemoglobinuria. If this kind of urine occurs after eating green broad beans, you should be alert to favism. The patient's red blood cells lack a substance called glucose-phosphate dehydrogenase, which is somewhat hereditary. Therefore, if you develop brown urine, fatigue, dizziness, nausea, yellow skin and eyes after eating broad beans, you should go to the hospital for emergency treatment in time to prevent accidents. Colorless urine 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.