Try not to drink water in the morning, because if you drink water, it will affect the blood volume, affecting the blood glucose and lipid test results, and in the morning when drinking water, if you do a barium meal examination of the upper gastrointestinal tract, it will lead to barium sulfate in the stomach wall can not hang, barium sulfate quickly through the stomach into the duodenum, affecting the results of the barium meal examination of the upper gastrointestinal tract, after drinking water is not possible to carry out a barium meal examination. In addition, after drinking water, gastroscopy cannot be performed, so if it is a morning checkup, try to have a light diet the night before, abstain from eating and drinking after 20:00 the night before, maintain a fasting state, and go to the hospital checkup center or health management center for physical examination. During the physical examination, some fasting items will be carried out first, and then you can eat and then carry out the examination items after eating.