Adolescence seems like the worst surprise ever -- where did all of this hair and these bumps come from? And why do I smell terrible? Don't despair -- we've laid out five ways skin changes during those years so you'll know what you're dealing with. See more »

Sweat is your body's way of cooling itself. Learn about eccrine and aprocrine sweat glands, how the body makes sweat, why we sweat and what factors affect sweating. See more »

No matter how old you are, deep wrinkles on your face may tell a different story. How do you determine your skin age, and what are some of the factors that contribute to fine lines and dryness? See more »

Sweating is yet another sometimes embarrassing -- but totally unavoidable -- fact of life. Find out how sweat is made and unusual facts about sweat with this quiz. See more »

Aging skin is a fact of life. At some point in each of our lives, our smooth and supple exteriors become dry, wrinkled and saggy. And although much of aging is biologically inevitable, there are some things you can do to protect yourself from the ravages of time. See more »

Pregnancy is a time of joy for many mothers, but sometimes it's accompanied by various skin problems. Are they anything to worry about? And will they go away after the baby is born? See more »

Your skin can use all kinds of vitamins to stay healthy, but one -- vitamin D -- is so important that your skin actually produces it. If you aren’t getting enough vitamin D, though, it can lead to problems. See more »

Your skin is your body's largest organ and protects you from the elements, but how does it protect itself from toxins? Believe it or not, you actually do most of the work. See more »

What happens to dead skin cells when they fall off your body? Are you sure you want to know? If you're sure you want the answer to this question, get ready for some staggering numbers. See more »

Your skin is your largest organ, and it's constantly shedding skin cells and replacing them -- but how much skin do you really have? See more »