Generally, stitches can be removed 7 days after open-heart surgery, noting the corresponding trends in the condition. If the patient is in a state of hypoproteinemia, diabetes, or cachexia, such wounds tend to heal relatively slowly, and some may even show signs of delayed healing or non-healing. In this case, the stitch removal time will be extended appropriately, and even a second surgery will be required before the stitches can be closed again and the stitches can continue to be removed later. If the wound is infected and there is a purulent discharge, it is not possible to remove the stitches in 7 days in this case, but only to actively apply antibiotic treatment, as well as local debridement and suture treatment, healing better before the stitches can be removed after 7 days. The general 7-day suture removal is a special treatment for some people with special conditions.