Recently there was a blackhead on my nose for months. It was just a tiny bump which eventually turned into a scab or at least that's what I think it was. And when the scab came off yesterday, it left a hole in my nose. The hole literally concave inward and I know when it heals up it would leave a dent on my face cause I had another one recently do the same thing. How can I prevent and heal this? I can also sent there's two more black spots on my nose and I want to prevent more dents from scarring my poor nose. Please help! Thanks!