Skin graft is the replacement of healthy skin onto an area where the skin has been damaged, lost or surgically removed. The healthy skin is harvested from a donor site (also called a source site) and transplanted to the recipient site. Skin grafting is performed to provide a protective barrier and to promote healing of open wounds resulting from trauma or infection, burns, venous (varicose) ulcers, pressure ulcers (bedsores), or diabetic ulcers that do not heal with normal treatment.