If you’re a person who has a bladder stone, the stone can move with the urine during urination and block the urethral orifice and cause interruption of urination. It is recommended to perform further urinary ultrasound to rule out the presence of bladder stones.2. Severe prostatic hyperplasia, when there is prostatic hyperplasia, the glandular enlargement compresses the urethra, causing increased urethral pressure, which requires overcoming the pressure of the increased urethra when urinating, making it difficult to urinate; and as the urine volume decreases, the bladder pressure decreases, resulting in intermittent urination or dripping. A urinary ultrasound is needed to find out if there is severe prostatic hyperplasia.