In Japanese culture, the variation is that if you cut your fingernails at night, then it opens up a way for bad spirits to enter your body through the fresh cut in your fingernails. In Japanese folklore, bad spirits are only around at night, so that is why you should not cut fingernails at night.
Why was cutting nails at night considered dangerous? In olden times, there was no source of light at night. Therefore, cutting nails at night could result in an injury to the person cutting the nails and people who step on the nail pieces by mistake.
According to this Eastern superstition, trimming your nails after dark could invite evil spirits into your home.
It is advised that you should not cut your nails during sunset and after sunset. It is believed that doing so can upset goddess Lakshmi and it can have an impact on your financial situation. Therefore, try and avoid cutting your nails during or after sunset.
The best time to trim your nails is immediately after taking a bath or shower. However, if that isn't possible, soak your nails in lukewarm water for a few minutes to soften them. Gather the proper tools. Use a nail clipper or nail scissors for your fingernails and a toenail clipper for your toenails.
Cut them on Sunday, the devil will be with you all the week.” In some countries, family elders passed down these superstitions as a guide to new parents to know about their newborn's nails.
According to the above discussions and arguments, in our opinion, clipping nails or cutting hair during menstruation and major hadas are not prohibited but makruh according to scholars, for it is among the innate (natural) matters, especially in regards to cleanliness.
Bad Luck Superstition: Cutting one's fingernails at night brings bad luck and sickness.
A common concern of cutting and biting nails too short is permanently altering the nail bed, potentially preventing the nail from growing back. The good news is, that's unlikely. “The underlying irritated, painful nail bed will heal very quickly (a few days) if it is kept clean and well hydrated,” Stern says.
Cutting hair at night without proper lighting could result in unsanitary conditions such as hair in food or a dirty household. In order to prevent young men and women from cutting their hair late at night, this rather morbid hair cutting superstition was passed down by the older generation.
Tuesday is dedicated to worship Maa Durga and Mahalakshmi in Hinduism. Worshipping them on Tuesdays is supposed to bring luck and money. Tuesday is called Mangal Var or the auspicious day. On auspicious days and on festivals cutting nails and haircut will not be done, as these activities are considered as inauspicious.
Before the invention of the modern nail clipper, people would use small knives to trim or pare their nails. Descriptions of nail trimming in literature date as far back as the 8th century BC.
As we use our hands to touch, all the dust and different kinds of bacteria accumulate on the nails. When nails are clipped inside house, others may tend to step on them which results in spreading of dangerous bacteria. It turns more hazardous if it enters human body by any means.
It is just a myth. Only possible reason is that there used to be no electricity and even a nail cutter was not availabe at that time. People used to cut their nails with a knife or similar type of sharp equipments. Thus, cutting nails at night would lead to unwanted accident and people would end up hurting themselves.
It appears to the spectator that anyone lying on this "bed" would be injured by the nails, but this is not so. Assuming the nails are numerous enough, the weight is distributed among them so that the pressure exerted by each nail is not enough to puncture the person's skin.
The resulting force per unit area or pressure is not sufficient to pierce the skin. The trick to lying on a bed of nails is getting onto or off of the bed of nails in such a way that most of the nails start or stop touching you at about the same time. This keeps the weight force spread over a large number of nails.
Friday is considered as the day of glamor. You can definitely go for this day as the day is associated with the planet Venus, the planet of beauty. Therefore, on this auspicious day if you cut your hair, you will receive fortune, wealth and fame.
Praise be to Allah. Cutting nails and shaving the pubic hair are not things that are obligatory for the fasting person in particular, but they are not things that go against fasting either. Rather the fasting person refrains from eating, drinking and having intercourse, which are things that invalidate the fast.
Nails should not be clipped on a Wednesday as some Ahadeeth (plural of Hadith) have censored doing so. Although Zaeef (weak) in transmission but established nonetheless, some traditions state that clipping nails on a Wednesday causes leprosy.
Muslims generally avoid painting their nails because it creates a barrier between their skin and the water during Wudu (water ablution), meaning that the water will not reach every part of their body, as it is required before prayers.
It is not allowed in Islam to eat anything like your chapped lips, nails, etc.
The religious etiquettes of Islam specify that removal of pubic hair should be initiated at menarche, and done at least once every 40 days [13, 20].