Lie much can be a sign of illness?   
Some frames can configure symptoms of personality disorders. The history of compulsive lying psychopaths appears in, for example, and unlike what most people think, is not only psychopathic serial killer. There are corporate psychopaths, who are those who have no compunction about committing any kind of scam, pass over his colleagues and family for the sake of personal gain or business. There are still people who have antisocial personality disorders, which lie to take advantage of weaknesses of others. An example is seductive woman who wins just to give it a blow. Recalling that the compulsive liar is not necessarily man. Women also suffer from this disorder.