The speed of healing depends on how large or deep the cut is. Deep wounds can actually take years to fully heal. Open wounds take longer to heal than closed wounds. This is because the sutures close up and reduce the area the body has to rebuild.
In most cases, after about 3 months most wounds are repaired. The new tissue skin and tissue is about 80 percent as strong as it was before it was injured.
Surgical wounds typically heal faster than naturally occurring wounds, healing in from 6 to 8 weeks in most cases.
Wounds often heal faster and more cleanly if they are kept covered.