Pay attention to diet three days before physical examination: don't drink, eat high-protein food, don't eat animal viscera, such as pig liver, and have a light diet three days before physical examination.

You can't eat before taking blood for abdominal B-ultrasound. You can't drink water or eat before drawing blood. Drinking water and eating will affect the test results, and you can't urinate and eat when you do abdominal B-ultrasound, so you need an empty stomach test.

Female medical examinees should not clean vagina within 24 hours before examination, but can clean vulva to ensure the accuracy of examination.

Extended data:

Precautions before physical examination:

1, rest and fast (including water) before 22 o'clock the day before physical examination. Avoid strenuous exercise and emotional excitement, and ensure adequate sleep, so as not to affect the physical examination results.

2. Empty stomach before physical examination. Fasting time should be controlled below 18 hours and above 12 hours. Generally, it is advisable to stop eating after dinner the night before the physical examination until the end of the physical examination.