Dark brown urine can be caused by dehydration, acute cystitis, acute pyelonephritis, serous disease and other factors.
1. Dehydration: massive vomiting or severe diarrhea can lead to high water loss in the body, and the urine can become dark yellow or even dark brown after concentration.
2. Acute cystitis: after the occurrence of acute cystitis and other diseases, the bladder mucosa is stimulated by inflammation, the mucosa may appear edema, a small amount of bleeding can be mixed with urine, resulting in the urine discharged in dark brown color.
3. Acute pyelonephritis: In acute pyelonephritis, bacterial infection may occur in the renal calyx, local capillary rupture, mixing with urine may appear hematuria, and in severe cases, black-brown urine may be presented.
4. Fava bean disease: Fava bean disease is caused by the lack of 6-phosphate glucose dehydrogenase, which can trigger hemolytic reaction after eating fava beans, and then can cause black-brown urine.
When the urine is black-brown, you should consult a doctor as soon as possible, and under the guidance of a specialist, you can actively carry out the appropriate treatment to help alleviate the uncomfortable symptoms as soon as possible.