During a prostate ultrasound, it is important to have a full bladder, which means holding your urine. A full bladder, one, pushes away the bowel in the lower abdomen and can show the prostate well behind the bladder through the urine. Two, you can check the size of the prostate. Three, can also check the prostate for dysmorphism, whether the form is rounded and bulging, the form is irregular also partially protruding into the bladder. Fourth, you can also check whether the echoes of the glands in the prostate are homogeneous, whether there are foci of calcification, whether there are stones, whether there are prostate cysts. Fifth, you can also check whether there are nodules in the prostate and whether there is a space-occupying lesion. When encountering a space-occupying lesion, be sure to observe the color blood flow, look at the supply of blood flow within the gland, the spectral pattern of the blood flow, and so on.