When you see someone having a seizure, trying to figure out how to help can get scary. But there are plenty of things you can do.

West Nile virus is most prevalent in the summer and fall. Learn the symptoms and how to avoid this mosquito-borne illness.

Have you heard of frostnip? It's a less severe version of frostbite. Learn symptoms and treatments for both.

A doctor explains what often happens to people's bodies when they drown—when organ damage begins and how water is breathed in.

Hydrogen peroxide can damage healthy cells when you use it to clean a wound, this doctor says. Here's his advice on minor wound treatment--starting with plain old water.