You have learned that sometimes medicine can scare people. Calming them seems to help ensure that you are not disrupted during critical moments. Add your Charisma modifier to all Healing-related rolls.
In addition, you can use your bonus action to comfort a creature you can see within 30 feet. You end the frightened or charmed condition on that creature, and the creature becomes immune to that condition for 1 minute. For the duration, any damage taken by the creature is reduced by 1d4. This increases to 1d8 at 4th tier, 1d12 at 6th tier and 2d8 at 8th tier.
You can use this feature three times, and regain your uses after finishing a short or a long rest.