In the physical examination, the stool needs to be routinely tested, which can effectively understand whether there is a hidden disease in the patient’s body. The following precautions should be taken when examining the stool: 1. Do not overeat, before the routine stool examination patients need to follow their original habits of life, do not eat and drink, otherwise it will affect the intestinal health. 2. When the stool appears pus and blood, the part with pus and blood should be collected during the sampling. 3. If you want to check whether the patient has parasites, you need to dip a small amount of stool in each part of the stool and send it for examination.