EC caused by intense trauma

My EC used to be only on my upper lip. I had a lip surgery 6 months ago to remove a black spot that was on my lower lip and, god damn it, i developed all the symptoms of EC on my lower lip after the surgery.

So obviously my lower lip got EC because of the trauma caused by the surgery (swelling, stitches, scabs etc etc).

My question is: what is the best way to heal EC when it is 100% sure that the cause is/was trauma?

ATM im just "managing" by constantly moisturizing and removing the build-ups when it starts to be thick and noticeable (usually after 7/8days)