Black urine

Black urine is relatively rare and often occurs in patients with acute intravascular hemolysis, such as those with malaria, which is medically called black urine fever, which is one of the most serious complications of malaria. Such patients have a large amount of free oxygen, hemoglobin, and oxygenated hemoglobin in their plasma, which are excreted with urine and cause the urine to appear dark red or black. In addition, a small number of patients also cause dysuria after taking levodopa, cresol, phenylhydrazine, etc., which will disappear after stopping the drug. There are data reports abroad, patients with paroxysmal myoglobinuria will also discharge brown-black urine after exercise, accompanied by muscle weakness, can gradually develop into paralysis. In addition, black urine can also be found in phenol poisoning, melanoma, and uric acid.