Secondary wound healing, or secondary intention wound healing, occurs when a wound that cannot be stitched causes a large amount of tissue loss. Doctors will leave the wound to heal naturally in these cases. This may be more common for wounds that have a rounder edge, cover uneven surfaces, or are on surfaces of the body where movement makes stitches or other closure methods impossible. Secondary wound healing relies on the body’s own healing mechanisms. This process takes longer, which may be due to increased wound size, the risk of infection and contamination, and other factors, such as the use of certain medications.