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Where do lice originate from? The truth is that this parasitic insect that has been living on Earth for millions of years.

Excessive underarm sweating can be embarrassing. Visit HowStuffWorks to learn all about excessive underarm sweating.

Freckles are a common beauty skin problem. Learn more about how freckles work at HowStuffWorks.

If you've got allergies, you know the drill. Learn allergy symptoms, reactions and the immune-system mix-up we call an "allergy."

Psoriasis can be a painful skin problem. Learn more about how psoriasis works at HowStuffWorks.

Identifying and treating skin rashes can be tricky. See these 10 tips for identifying and treating skin rashes to get informed.

A group of researchers out of Cornell and Purdue has suggested a possible cause for autism: television. Learn more about what they found.

Do people who sweat a lot eat more salty foods? Visit Discovery Health to learn if people who sweat a lot eat more salty foods.

When do you need a clinical deodorant? Visit Discovery Health to learn when you need a clinical deodorant.

Some people's sleep cycles are simply out of tune with the rest of the world. HowStuffWorks looks at the science of insomnia.

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