<s>[INST] hello i am 26 yers old female. i have a dental problem. before 2 months i found a crack in the bottom side of  my front theeth, after some days there are chak like some thing out from that teeth and become a hole. and after 2 months  i found that the same thing in another teeth . please tell me what is this problem i dont have any pain or bleeding in my teeth. how to recover from this problem [/INST] HelloI have gone through your query.it can be due to caries(cavity) in your teeth.plz mention your profession or any habit if u hv.chalky substance can be a sign of early caries or any defect in enamel.there is nt mch to worry bout.as there is no pain i suggest you to visit a dentist and get it filled.Hope this ans fulfills ur queryRegardsDr. Shesh </s>