Why urine turns red

The possible reasons for urine turning red are as follows: first, caused by drug or food staining, such as the use of foods containing more red pigment or oral rifampicin capsules, it will show red urine staining. Routine urine examination, which does not contain red blood cells, stop the relevant drug or food intake. Second, if there are hemorrhagic lesions in the urinary tract, it can lead to red urine staining. Such as acute urethritis, cystitis, etc., leading to local mucosal congestion, bleeding, then can show urine into red, accompanied by urinary tract irritation symptoms. If there are stones in the urinary system such as ureteral stones, kidney stones, bladder stones can lead to local mucosal bleeding, resulting in urine showing red, need for urinary system B ultrasound examination. If there is a tumor of the urinary tract, such as kidney tumor, bladder tumor, etc., it can also show red urine color, which needs to be further ruled out by CT examination of the urinary system.