What is the ruling on cutting hair on specific days of the month to increase its density and strengthen its growth?

If it is proven that shortening hair treats hair loss, then there is no harm in shortening it to the extent that achieves the treatment. Scholars have explicitly stated the permissibility for a woman to shorten her hair out of necessity, without it being disliked. It is advisable to consult doctors to confirm whether shortening hair causes it to thicken.