Cannabinoid Hyperemesis Syndrome (CHS) is a condition linked to long-term cannabis use. It causes cycles of intense nausea, vomiting, and stomach pain. Often described as the sickest someone has ever felt. Because cannabis is often used to ease nausea, CHS can feel confusing, frightening, and surprisingly easy to miss. ​ While CHS can feel confusing and frightening at first, many people find relief by understanding the pattern, recognizing triggers, and learning what the body needs to recover.​​