Our beloved Ameer-e-Ahl-e-Sunnat Maulana Ilyas Qaadiri دَامَـتْ بَـرَكَـاتُـهُـمُ الْـعَـالِـيَـهْ says:
‘The habit of biting one’s nails is bad, it can cause leprosy. Dirt and other things from them entering the stomach along with all sorts of germs is very harmful.’
Dear Children! We come to know that in order to stay healthy and protect ourselves from illness, it is necessary that we get rid of this bad habit and while adopting a good habit, we should cut our nails with a nail clipper.