What’s bladder outlet obstruction (BOO)?

What’s bladder outlet obstruction (BOO)?

Bladder outlet obstruction (BOO) is when the neck at the very bottom of your bladder gets blocked. The neck is where your bladder connects to your urethra, which carries urine (pee) out of your body. A blockage stops or slows down the flow of pee. Possible blockages include scar tissue, bladder stones, a large gland, cancer or a tumor.