One of the most common triggers of inflammation is a toxin known as lipopolysaccharide, or LPS. It's produced by a large number of bacterial species and acts as an outer coating for the organism. However, when the immune system comes into contact with this molecule, the local area goes into an immediate defensive posture. While infection hasn't initiated, the immune forces ready themselves for an attack. If LPS is sensed for an extended period of time, the effects may become systemic and affect the body as a whole.