Medicine
Medicine is the healing skill, and the party guide says assigning a companion as Surgeon lets their Medicine skill improve healing after battles. It describes effects during travel and waiting in cities, with city waiting providing faster recovery.
How it works
The skill page says Medicine develops by helping wounded soldiers heal in settlements. The guide also says Medicine helps troops recover from fatal wounds as wounded rather than dead, and affects captured enemies' outcomes. These are guide descriptions; no numerical recovery rates are supplied.
When it helps
Look for a companion with strong Medicine if party recovery is important.
Your next step
Help wounded soldiers heal in settlements to practice the skill.
Read the supporting references
Check the edition and source version for patch-specific details. Guide methodology.