Surgical Sutures are used by doctors to close wounds to your skin or other tissues. When your doctor sutures a wound, they’ll use a needle attached to a length of thread to stitch the wound shut. Suture material can be classified as either absorbable or nonabsorbable. Absorbable sutures don’t require your doctor to remove them. This is because enzymes found in the tissues of your body naturally digest them. Nonabsorbable sutures will need to be removed by your doctor at a later date or in some cases left in permanently.