What is wrong with the 2-3 small holes under the incision where water is flowing out? There are 2-3 small holes right below the incision in the chest, which are used for placing drainage tubes to drain blood and fluid from the chest and pericardial cavities during surgery. After removing these drainage tubes, some patients will have bleeding fluid coming out of the drainage ports, so don’t be alarmed, as this is the residual fluid inside the pericardial cavity flowing out, and it does not have any effect on you. Some patients will have bleeding from the skin edge when removing the drainage tube, usually fresh blood, the doctor will make the appropriate judgment, and if necessary, a suture is needed to make it close and stop bleeding.