Yellow front tooth

[Labacon]

The last month I noticed one of my front teeth is more yellow then the other. What could cause this?

 

[Eby]

Looks stained . Do you drink coffee, tea, soda or any drinks that have color in them ? They usually cause teeth to stain . A polish should help try baking soda paste (which is baking soda with water and mix until pasty) Don't use too much water
* note * do not use the paste everyday . You could really damage your enamel. But it's best to see a dentist .