Is this a early cavity?

[tempaccount]

Hi, I've never had a cavity before so I'm not sure what it's like in the early stages
I'm in no pain but i can feel a dent on the back of the tooth with my tounge. Is this a cavity?

 

[Dr M]

This is a poor quality picture. I doubt that it is a cavity though. Behind our lateral incisors, we have a lingual indentation or "fossa" and in some cases even a lingual pit. This is a variation of normal anatomy. If you have not been to see your dentist in a long while, you can always ask for a check-up, to make sure.