A lack of awareness of one’s problem gambling is a major barrier to seeking treatment. In this study, the researchers analysed data from 1,346 Canadian adults with problem gambling who did or did not feel that they had a gambling problem. Participants who knew that they had a gambling problem were more likely to experience gambling-related harms. They also lost a greater amount of money and felt a greater loss of control over their gambling. In addition, they were more likely to gamble alone and to have a family history of problem gambling. An increase in general awareness over time was associated experiencing more gambling-related harms; playing more gambling activities; feeling a greater loss of control; and having a lower education.