If you talk to someone living with MS about their journey, one of the first things they will tell you is that they knew something was wrong long before they received their diagnosis. While this anecdotal evidence has been commonly discussed, it was only relatively recently that the research world has started to investigate this concept. Through this work, the idea of an MS prodrome has been studied, with potential implications for early diagnosis and treatment. Host Brett Drummond of MSTranslate speaks with Prof. Helen Tremlett of the University of British Columbia, a leading expert in recognising and investigating the MS prodrome.