Causes of Black Urine
The most common causes of black urine are:
Hemoglobinuria – Hemoglobinuria is a condition in which red blood cells are destroyed and their hemoglobin is released into the urine. This can be caused by certain types of infections, such as malaria, or by certain types of autoimmune diseases.
Myoglobinuria – Myoglobinuria is a condition in which muscle cells are destroyed and their myoglobin is released into the urine. This can be caused by certain types of exercise, such as prolonged running or intense weight training.
Medications – Certain medications, such as certain antibiotics, can also cause black urine.
Melanin – Melanin is a pigment that is found in the skin, hair, and eyes. It can be released into the urine if the body produces too much of it. This can be caused by certain types of skin conditions, such as melanoma.
Diagnosis and Treatment
If you have black urine, it is important to see a doctor to determine the underlying cause. Your doctor will likely ask about your medical history, do a physical examination, and order tests such as a urine dipstick test and a urine culture. Depending on the cause of the black urine, your doctor may suggest medications, lifestyle changes, or other treatments.