I had a mole removed by shave biopsy on the side of my breast 12 days ago and it doesn't appear to have healed at all yet. I dont see anany signs of new skin and it still appears open. The wound bed is moist, but the drainage doesn't seem purulent. Why might it not be healing/ what can I do to improve healing? (The redness that's away from the site is irritation from the band aid)