Morning is the best time to cut your nails, because your nervous system is very sensitive after a busy day in the daytime, and cutting your nails at night can easily hurt your nerves.
It is a kind of folklore to get onychomycosis by cutting your nails at night, or to cut off your soul, or not to see your parents for the last time.
As adults often say, crying again will send you away or feed the wolf or something. Children don't understand some scientific things. Therefore, adults can only rely on intimidation at first. These statements are all said by the old man and handed down by the old man. Everyone says they are used to it, but there is no idealism.
Although these statements are unscientific, they have certain guiding significance for life, especially for the development of children's living habits. This is a summary of one's life. In ancient times, or hundreds of years ago, decades ago, or even now, in marginal mountainous areas, there was no special nail clipper used now, and clothes scissors or other knives were needed to cut nails. If there is insufficient light at night, you may hurt your fingers when cutting your nails. Therefore, people use the saying that "nail cutting at night will lead to onychomycosis" or "cutting off the soul" to remind people that nail cutting is best done during the day.