Black urine is what happens.

There is a congenital disease called melanuria, which is caused by a lack of black acid oxidase in the body. It is manifested from childhood, and the urine discharged turns black after a period of time. This is a congenital genetic disease that requires early intervention. It is specifically necessary to see a pediatrician. If adults show black urine, most of them consider blood in the urine. Diseases originating from nephrology, such as IgA nephropathy, nephritis syndrome, purpura nephritis, nephrotic syndrome, etc.; urology diseases, such as urinary tract infection, bladder stones, tumors, prostate hyperplasia, etc. Because bleeding remains in the bladder for a long time, it is discharged after oxidation to form black urine.