A non-filled bladder can affect the ultrasound results. The bladder is a pouch-like structural organ and if it is not filled, it may crumple and the wall of the pouch will therefore thicken, which can cause misdiagnosis of small lesions that will not be seen or will be considered a normal phenomenon and of normal thickness, which can lead to an incorrect assessment of the condition. Secondly, certain organs need to be lined by the bladder to show well, such as the lower part of the ureteral calculus, which needs a full bladder to be seen clearly, and the prostate needs to be lined by the bladder to be presented well. The same is true for the uterus; if the bladder is not full, the bladder will be positioned below the pubic symphysis and will not hold up the uterus well enough to show the uterus well. The bladder is a good acoustic window and can help show many adjacent organs, so it is important to fill the bladder adequately during a urinary exam or uterine exam. It is also very important that the application form clearly states whether the test requires a full bladder or not. Many times the application form is lost and the patient does not pay attention to it. Therefore, we remind you to read the notes on the application form, including whether the bladder needs to be filled, the examination on an empty stomach, and other special preparations, which are written on the notes.