Fingernails are an odd thing if you really think about them. What are they there for, anyway? And why do we file, buff and paint them outrageous colors? Nails are for more than decoration, though. Did you know that they can indicate if you have serious health problems? Take our quiz to find out what could be wrong if you have yellow or purple nails.
Question 1 of 20
We have fingernails to protect our fingertips and toes.
Question 2 of 20
Some scientists argue that without fingernails, the tips of our fingers and toes would have genetically developed to become more sensitive.
Question 3 of 20
Nails are made of keratin, which is also found in your skin and hair.
Question 4 of 20
About a quarter of the kids and teens in the United States bite their nails.
Question 5 of 20
Most people stop biting their nails by the time they're 18.
Question 6 of 20
Your fingernails will continue to grow for about a week after you die.
Question 7 of 20
Women's nails grow faster than men's nails.
Question 8 of 20
Fingernails grow about 2 to 3 millimeters every month.
Question 9 of 20
Your toenails grow about 1 millimeter a month.
Question 10 of 20
If you lose an entire fingernail, it'll take about two months for it to fully grow back.
Question 11 of 20
If you're right-handed, the nails on your right hand will grow slightly faster.
Question 12 of 20
The woman with the longest fingernails in the world hasn't cut her nails since 1965.
Question 13 of 20
Lee Redmond's right thumbnail is almost four feet long.
Question 14 of 20
You shouldn't use nail polish remover more than once a week -- it can weaken and dry out your nails.
Question 15 of 20
The most popular nail-salon treatment is artificial nails.
Question 16 of 20
Looking at your nails can give you important clues about your health. The next few questions will deal with symptoms that you can see in your nails. Here's the first one: Yellow nails may indicate a respiratory problem like chronic bronchitis.
Question 17 of 20
Bluish nails may be an indication of renal failure.
Question 18 of 20
A melanoma could show up as a black, brown or purple nail.
Question 19 of 20
If your nail beds are pale, it can indicate that you're suffering from chronic fatigue syndrome.
Question 20 of 20