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

Hemangiomas are a type of birthmark. Learn more about how hemangiomas work at HowStuffWorks.

Laser skin resurfacing is a popular skin treatment. Visit HowStuffWorks to learn all about laser skin resurfacing.

Lichen planus can be a bothersome condition. Visit HowStuffWorks to learn all about lichen planus.

Lip plumpers can give you soft, kissable lips. Visit HowStuffWorks to learn all about lip plumpers.

Tretinoin is a drug derived from vitamin A that has beneficial effects and some serious side effects, too. Learn about tretinoin at HowStuffWorks.

Crypton Super Fabric is specially designed for easy clean up and maintenance. Read more about Crypton Super Fabrics.

America's Army is a video game that was developed by the U.S. military that simulates real-life combat. Learn about the America's Army video game.

Pryomania, or fascination with fires, is a controversial topic. Learn what causes pyromania, how pyromania can be treated and how common it is.

The Incan empire was erased from existence by fewer than 200 men, but how was this possible? Find out how the Incan empire was brought down.

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