Experts believe that CHS, the mysterious and rare marijuana-related illness, is caused by an overstimulation of certain cannabinoid receptors in the body. SUBSCRIBE to ABC News on YouTube: https://bit.ly/2vZb6yP Latest updates: http://abcnews.go.com/ Watch FULL EPISODES on Hulu: http://abcn.ws/3bzvQQn #news #marijuana #health #abcnews