What is gambling? What is problem gambling?

from the National Council on Problem Gambling

"Gambling is risking something of value on an unknown outcome that depends on chance or skill.  Gambling becomes a problem when it causes a disruption in any major area of life: psychological, physical, social, vocational, health, spiritual, or emotional.  Problem gambling is characterized by the inabillity to resist the impulse to gamble, even when there are negative consequences.  Loss of control is at the heart of problem gambling."