For years people who have chronically used marijuana and then have this cyclic vomiting and abdominal pain were probably diagnosed with a stomach flu when it might be this "mystery" disease called CHS. The cure, to stop using marijuana. What's weird about this one, is if someone is nauseous, he may use marijuana to make it subside. But then the CHS gets worse. What is CHS (Cannabinoid Hyperemesis Syndrome)?