There are several types of wounds.   I remember as a child occasionally getting hurt while playing outside.   I would run home to mom for patching.  Some of the wounds were scratches that needed just a hug and band-aid; others required medical attention; and, others ran so deep that they were not seen.   Neither Mom or a doctor could patch these deep inner wounds.

“He heals the brokenhearted And binds up their wounds.”  Psalm 147:3 NKJV

“But He was wounded for our transgressions, He was bruised for our iniquities; The chastisement for our peace was upon Him, And by His stripes we are healed. Isaiah 53:5