Whether or not you can drink water in abdominal ultrasound examination is closely related to the needs of the examination, part of the examination needs to prohibit water so as not to affect the accuracy of the examination, while some examinations need to be filled up internally in the examined area, but instead need to be assisted in the examination by drinking a lot of water, as follows: 1. When it is necessary to check the liver, gallbladder, pancreas, adrenal glands, upper abdominal mass, and the large blood vessels of the abdomen, the examined person should pay attention to the examination of the 1 day before the examination water and food fasting after dinner, so as not to accumulate gas in the intestines, or affect the emptying of the gallbladder, resulting in inaccurate test results. In addition, when performing gastrointestinal examination, anti-distension tablets can be taken as needed to assist in the examination; 2. When examining the uterus, uterine adnexes, ovaries, pelvis, bladder, prostate and other parts of the uterus, it is necessary to prevent interference from the surrounding parts of the uterus by drinking a lot of water, and to perform the examination after holding urine. Sufficient urine can make the examination area fill up, so as to make the examination process more clearer and the results of the examination more accurate. Therefore, before the abdominal ultrasound, the examinee should keep in mind the preparations before the examination as explained by the doctor, and need to communicate with the doctor in time if it is not clear, so as to avoid inaccurate examination results caused by insufficient preparations. In addition, 2 days before the abdominal ultrasound examination, barium meal of gastrointestinal tract and cholangiography should be avoided to avoid misdiagnosis.