Answer – Wounds which are having the dirt take a long time for getting healed. In case of Mary when she got the wound without even checking whether the handkerchief is clean or not, she tied it over her wound. The handkerchief may the source of the dirt and debris. They are the major sources of entry of bacteria into the wound which may obstruct the naturally and early healing of the wound. Above all that laceration that was coming out of the wound is also the source of more infection that may spread on the nearby areas of skin where the wound is again cause more problems in terms of the positive reaction of the medicine that is given to Mary for getting healed. The handkerchief that was tied by Mary may be made up of suture material that is actually very thin. This gets broken very easily and gets inside the wound causing it to become more painful and removing it may break the edges of the wound and it will take more time to heal. It is not only the handkerchief that causes the infection. There is a medium or mode of air that blows and is a rich source of micro-organisms and the bacteria that may cause more infection in the patients who are having skin wounds like Mary. It is therefore suggested that the wound has to be cleaned properly and left open till it is been consulted for with the doctor. He will only guide on the action that has to be taken in this regard for any change in medication or antibiotic treatment.