The possible causes of brown urine: 1, the presence of infection in the urinary tract, such as the presence of urethritis, a small amount of discharge in the urethra combined with a small amount of bleeding can be manifested as brown secretions with the urine and eliminated. At the same time may be accompanied by urinary frequency, urinary urgency and pain and burning sensation in the urethra during urination, it is recommended to carry out routine urine examination to further clarify. 2, if there is a hematoma in the bladder, it may discharge brown blood clots, at the same time may be accompanied by red urine or accompanied by urinary frequency, urinary urgency and other discomfort, need to carry out routine urine examination and urinary system ultrasound to further identify. 3, paroxysmal sleep hemoglobin, urine more in the The presence of brown urine after waking up in the morning is caused by more hemoglobin in the urine after the destruction of red blood cells, which requires further examination to clarify the diagnosis and then treat it symptomatically.4. If jaundice is present, high levels of bilirubin and urobilinogen in the urine can lead to dark brown or yellowish-brown urine. It is usually not accompanied by symptoms of urinary tract irritation, and further examination of the bilirubin level in the urine is needed to confirm the diagnosis.