Pyromania

An impulse-control disorder, pyromania is an obsession with fires and a repeated urge to start them. Before setting a fire, sufferers may feel tense or excited, then experience relief or thrill after completing the act. They may also be fascinated by firefighting and in particular, the efforts taken to extinguish their own blazes.

Pyromaniacs are different from people who set fires for insurance money, revenge or other rational reasons and do not plan their fires in advance.