What causes urine occult blood positivity?

1,

excessive activity in a short period of time excessive activity leads to renal vascular spasm, congestion, red blood cells leak out of the blood vessels, urine occult blood positive.

2, urinary system infection

urinary system infection is a common cause of urine occult blood positive, patients kidney, bladder, urethra and other parts of the inflammatory stimulation, will cause increased vascular permeability, resulting in urine occult blood positive.

3, kidney stones in patients with kidney stones

lead to stone movement damage surrounding kidney tissue, will cause bleeding, performance for urine occult blood positive.