Hard white thing growing at the back of my teeth

[Mjm]

i dont know what is this thing growing at the back of my lower teeth. I believe this isnt a tooth, it grew just a month ago. Can you give me some advice if this is an infection or urgently needed to see a doctor? Thanks

 

[Dentgr]

This is tartar buildup.

 

[drmins]

Its nothing but calculus build up. Get your scaling (cleaning) done by your dentist,periodically. The irregular placement of teeth in that area contributes to this debris buildup. Pay special care in oral hygiene or get it corrected orthodontically.

Advanced treatments like invisalign and inman aligners can help in correcting the arrangement,without using braces.