It is not pyromania if someone sets a fire in response to a delusion or hallucination. It is also not pyromania if the person setting the fire is in the manic phase of bipolar disorder, has a conduct disorder, or has an antisocial personality disorder. A true pyromaniac just likes fire. People with this disorder may have poor social skills. Many have learning problems.
Pyromaniacs tend to plan in advance to start fires.
Many of them like to watch any fire they can. They may like to set off fire alarms. People with pyromania often do not seem to care about the loss of property, the injuries, or even the deaths that result from fires. Pyromania in children is rare. Juvenile fire setting is usually associated with other conditions such as Conduct Disorder, ADHD, or Adjustment Disorder.