The phrase
"several stitches" means that a person had a wound or cut that required the use of thread and a needle to close it.
Full definition
Nancy ended up with
several stitches in her face and nightmares; the dog was euthanized for biting; and both families were traumatized.
He was covered in bite wounds that took weeks to heal after surgery,
several stitches, and a round of antibiotics.
After removing the required tissue,
several stitches will be placed.
A general anesthetic is administered, the testicles are removed (oriectomy), and
several stitches are used to close it up.