Not only can you not eat 12 hours before the physical examination, but also snacks, beer, drinks, snacks, small dishes and other calorie-containing foods, as well as calorie-containing drugs, such as Chinese medicines in syrup, need to be prohibited. The items that require fasting in routine physical examinations are mainly fasting blood sugar, blood lipids, liver function, kidney function, and ultrasound of liver, gallbladder, pancreas and spleen. The annual physical examination has slowly become more and more people’s habit, many units are also organized every year to the hospital physical examination of employees, basically know that the physical examination before the need to fasting, do not eat, how long the specific fasting, how long do not eat, many people can not answer. The problem of eating before the physical examination, specifically the day before the physical examination before 8 o’clock eating finished, 8 o’clock after fasting, however, can be appropriate to drink water.