Behavior of compulsive lying is truly a controversial topic discussed in psychology. Pathological lying is the process of lying persistently to get going without paying little or no concern for others.
Sociopath
The person who lies constantly is called a sociopath and he always lies to get his goal accomplished. He is not bothered about the feeling of others. The personality of such sociopaths is charismatic and they use their maximum talent and social skills in self centric approach.
Compulsive Liar
It is the person who habitually lies repeatedly. The art of telling lies has become his/her habit and they very often respond to questions by telling lies. The answers will carry little elements of truth and they often manipulate the truth either large or small. The individual feels uncomfortable in telling the truth and this habit develop right from his childhood.
Characteristics
Psudologia fantastica is the name given for pathological liars who will have the following traits in them.
Whenever they tell lies, they will include some truth in it and they manipulate the truth to some extent. If questioned, they can even admit that what they told was untrue. The habit of telling lies is long lasting and it does not stem out as a response to particular situation or environment. A pathological liar will not tell lies out of pressure and it would have become an innate trait for of his personality.