WHY IT MATTERS: If you use cannabis regularly and experience recurring nausea, vomiting, or abdominal pain that temporarily improves with hot showers, you should talk to your cannabis clinician about adjusting your dose, frequency, or product potency before your next ER visit. CLINICAL OVERVIEW: Cannabis hyperemesis syndrome (CHS) is a real clinical condition characterized by cyclical vomiting, nausea, and abdominal pain in frequent cannabis users, and emergency departments across legalized states are reporting increased presentations. While CHS can be distressing and even dangerous if dehydration becomes severe, it is almost always associated with very high-frequency, high-potency use and resolves reliably with cessation or significant dose reduction.