Red line on gum coming from tooth with an old porcelain crown.

[USA2Elsewhere]

It's on the area of an upper molar. I see the dark metal line of the crown at the gumline. The redness doesn't go around the tooth that's common which is parallel. It doesn't follow the shape of the tooth. It's perpendicular to the tooth. Its a thin red straight line about one half inch long. What are the possibilities of what this could be? Scared and dealing with health and dental anxiety.

 

[Gordon]

Might be from trauma? Scratch from a new toothbrush or a sharp edge to a piece of food. You can get nasty sharp edges on things like potato chips (crisps)