Probably all of us have seen people who bite fingernails and the skin around them. Whenever you see such things, you need to talk about the dangers and warn people not to bite nails.
Various germs, bacteria and worm eggs accumulate under the nail. Even if we wash our hands, we cannot affect them. Nail biters are easily infected by these microorganisms, so nails should be clipped frequently. People who eat the skin around the nails and manicure their nails cut the hardened skin around the nails, which reduces the skin’s ability to defend itself, and harmful microorganisms under the nails can easily enter our body. In addition, when you shake hands with someone, HPV (humulus papilloma viruses), germs and fungi that live on the skin can enter the body from damaged areas of the skin, causing skin condyloma and candidiasis. The habit of those who bite their nails can be broken as follows: if it is a child who bites nails, hot pepper or horseradish root can be rubbed on the fingers.
Keeping nails, oral cavity and armpits clean is also recommended in the Sunnah (the Islamic religious practice).