Medically reviewed by William Truswell, MD Fingernails grow 3.47 millimeters a month; toenails grow 1.62 millimeters a month.Taking biotin supplements may strengthen nails and promote their ...
“Nail biting can cause small injuries around the nail, allowing bacteria, viruses and fungi to enter. This may lead to an infection called paronychia, which causes inflammation of the nail fold,” ...
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