After open-heart surgery, bacteria are everywhere, but they will become less after washing and will not cause disease when they are reduced. So usually you can wash your hair 3 days after stitch removal, and you can wash hard in non-wound area, and you can wash slowly in wound area, just don’t dig the wound and crack it. However, some blood scabs should be gradually washed clean by washing slowly. If you encounter a wound in the field, the first time to clean the wound, the cleaner the cleaning, the less chance of infection. Therefore, 3 days after the removal of stitches after surgery, patients are asked to start washing their hair to clean the scabs and necrotic material by washing it several times.