Medically reviewed by William Truswell, MD Fingernails grow 3.47 millimeters a month; toenails grow 1.62 millimeters a ...

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Growing your nails takes time. From age, to chronic illnesses, to even the time of year, lots of factors can impact the speed in which your nails grow. Whether you've broken a nail and are trying to ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Growing out your nails is no easy feat, especially if genetics aren’t on your side, you’re a nail biter, ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...