Main Page | See live article | Alphabetical index Pus is a whitish-yellow or yellow substance that can be found in regions of bacterial infection, including superficial infections, such as pimples, and deeper infections, such as abscesses. Pus mainly consists of white blood cells and dead bacteria, as well as inflammatory exudate. When seen in a wound, pus indicates it is infected, and it should be cleaned with an antiseptic. This article is a stub. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.