WHY IT MATTERS: If you use cannabis daily or near-daily and experience recurring vomiting episodes that seem to improve with hot showers, discussing CHS with your doctor is important because the only reliable treatment is stopping cannabis use entirely. CLINICAL OVERVIEW: Cannabis hyperemesis syndrome (CHS) is a paradoxical condition in which chronic, heavy cannabis users develop cyclical episodes of severe nausea, vomiting, and abdominal pain, despite cannabis being widely recognized for its antiemetic properties. The syndrome is strongly associated with long-term, high-frequency use, particularly of high-potency THC products, and a hallmark feature is temporary relief of symptoms through hot showers or baths.