I had an extraction 3 days ago, with a temp. bridge put in. The extraction was second molar from the back on the bottom. There has been a small wound developing and seemingly growing on the inside of my gum, right under the extraction site (facing my tongue). I feel no pain from it, but the edges look white. Not sure if it's infected. No antibiotics were prescribed. I'll probably go back and have it checked unless it starts to heal. My question is, is it safe or advisable to use a product like Colgate Peroxyl?