I have a habit of bitting nails.I listen that during fasting is a person bite nail, the fast breaks. is it correct or not?
Biting the nails itself does not break the fast, however swallowing them would break the fast.
Notwithstanding, biting the nails is a vile, reprehensible act especially as there can be filth under the nails. One should endeavour to break this habit. Speak to your Local GP, who can advise accordingly.