Finding the inferior vena cava under ultrasound involves the use of ultrasound for computerized imaging and then computerized data processing to determine the location of the inferior vena cava. Finding the inferior vena cava under ultrasound is the use of an ultrasound detector, which sends out ultrasound waves that pass through the body, through the abdominal cavity, and then reflect the contents back to the receiver for calculation, and then by the computer for image processing, the doctor, according to the image map, mark the extent of the inferior vena cava in the image, and the width of the inferior vena cava is output by the computer. The inferior vena cava is found under ultrasound, and in addition to its indicators, its blockage is checked. The inferior vena cava is primarily responsible for returning venous blood from the lower body to the right atrium. If the inferior vena cava is blocked, hepatomegaly, ascites, enlarged kidneys, and back pain can occur. Blockage of the inferior vena cava in the lower part of the body can also cause increased venous pressure in the lower extremities, edema of the lower extremities, and superficial varicose veins. Finding inferior vena cava under ultrasound, it is recommended to do a good examination under the guidance of the doctor, and cooperate with the treatment in time if there is any discomfort, so as not to delay the condition.