What causes black urine?

Clinically, dark urine is relatively rare, and if it does, it is mainly for several specific diseases. Hemolytic diseases, such as malaria, paroxysmal hemoglobinuria, nocturnal hemoglobinuria, etc., rank first. What is called hemolytic disease, that is, the intact red blood cells in the blood are destroyed, the hemoglobin in the red blood cells is released, hemoglobin reaches, exceeds the recovery capacity of the kidney, it will make the urine show the color of soy sauce or dark brown to black, this kind of hemolytic disease caused by black urine is a more typical syndrome group. There are also some drugs that can cause urine to be darker black, such as Parkinson's disease patients, there is a drug called levodopa, when taking this drug, some patients urine can become a dark brown color. There are also melanoma patients, because melanoma patients, tumor cells can produce melanin, when more can also make urine appear black, black urine is mainly the above several cases.