Slightly off topic. I'm a 24, male and have noticed that my gum line has receded. On the back side of my front lower teeth where maybe the root or something is partially exposed. It has worried me. and when I floss down to that area, I feel a mild sensitive feeling that can be aggrivating. Is there anything I can do to make the gums possibly move back up? I figured this would be the best place to ask. Thanks!