Applying heat to wound helps it heal & increase blood flow.

I been researching why wounds don’t heal and the reason is not enough blood flow to the wound. Applying heat to the wound, through a heating pad, electric blanket, a hot-water bottle, medical heating pad, will stimulate blood flow to the wound site, according to Dr. Rabkin. Don't scald yourself; a few degrees above your body temperature will do the job. You can apply the heat 15 to 20 minutes at a time, several times a day.
I will try this method of heating the lips with a heat pad for 1 week to see if it improves.