Generally, drainage tubes with less than 100 ml can be removed if there is no infection or pus. Drainage tubes are plastic tubes placed low in the body to communicate with the outside world, and are often used to drain digestive fluids, abdominal exudate, and exudate from surgical incisions, etc. They are used to lower the local pressure, to prevent local infections caused by exudate accumulation, and to monitor whether bleeding occurs, thus promoting healing, and are commonly used in the chest cavity, the abdominal cavity, and the gastrointestinal tract. If the drainage tube is clear, make sure that the drainage fluid is clear and transparent, and the drainage fluid is less than 100 ml a day, then the tube can be pulled out. In the process of pulling out the tube, it is necessary to carry out aseptic operation to prevent bacterial infection, and it is necessary to observe whether there is any bleeding or large amount of seepage at the dressing site in the first 24 hours after pulling out the tube, so as to prevent the dressing from being detached or shifted and other situations. After the drain is removed, attention should be paid to the intake of protein-rich foods such as eggs, milk, lean meat, etc., to promote the healing of the incision site of the drain, in daily life, should avoid strenuous exercise, to prevent the incision site from infections, etc., and if there is fever, local inflammation and so on, it should be timely to go to the hospital for medical treatment.