Stomach ultrasound can usually be done only about 6 to 8 hours after a meal, and stomach ultrasound usually requires an empty stomach. The stomach ultrasound is usually able to show the stomach wall hierarchy, and can also observe the patient’s stomach for tumors and other phenomena. Gastric ultrasound usually needs to be performed on an empty stomach, after a meal, with an interval of 6 to 8 hours. If stomach ultrasound is performed immediately after a meal, the stomach may not be able to observe the stomach lesions because the stomach is filled with food, thus affecting the doctor’s judgment. During the gastric ultrasound, attention should be paid to keeping an empty stomach, relaxing the mind and avoiding too much nervousness. On the day before the examination, attention should be paid to banning smoking and alcohol to reduce the secretion of gastric acid. After the stomach ultrasound, you should pay attention to fasting for 2 hours, and after 2 hours, you should pay attention to avoid eating too cold, spicy and stimulating food. If there is any discomfort, patients are advised to go to the hospital in time to avoid delaying the condition.