CCSA has developed an introductory learning module as the first in a planned series of modules on the topic of stigma and substance use. These modules are developed with the needs of both the general public and professional audiences in mind. The first module, The Sting of Stigma, will introduce you to the concept of stigma, and explain why it is harmful and what its impacts are on people with problematic substance use and substance use disorder. After completing the first module, you will understand that substance use disorder is a medically diagnosed health condition and that by using person-first language you can begin to change the way you think about people with substance use disorder. The overarching goal of this and future modules is to increase your understanding of stigma and equip you with the tools and knowledge you need to address stigma at home, in the workplace and in your communities.