Question:

What do the scholars and experts of the shari’ah say regarding a person who chews and bites his nails whilst he is fasting, does it invalidate his fast?

Answer:

All Praises are for Allah ﷻ and may peace and blessings be upon His Messenger ﷺ.

The fast is not invalidated if a person bites his nails as long as nothing is swallowed. However, if the nail is swallowed and it reaches the stomach then the fast will be invalidated.

And Allah ﷻ knows the best.

This Fatwa is written by Dr.Hafiz Muhammad Munir Al-Azhari