US sees a big jump in nausea cases among frequent marijuana users in the hospital
Summary
The U.S. has seen a noticeable increase in hospital visits from frequent marijuana users suffering from cannabis hyperemesis syndrome, a condition causing severe nausea, vomiting, and stomach pain. This rise is partly because a new medical diagnosis code for the syndrome was introduced last fall, making it easier for doctors to identify and report the condition.Key Facts
- Cannabis hyperemesis syndrome causes repeated nausea, uncontrollable vomiting, and severe abdominal pain.
- Emergency room visits for this syndrome rose by 16% from October 2025 to May 2026.
- The new diagnosis code was introduced in October 2025, improving tracking and awareness of the condition.
- Around 200,000 hospital visits for the syndrome occurred between January 2023 and summer 2025.
- The biggest increase in cases is among people aged 15 to 24, teenage girls and women, Black Americans, and American Indian and Alaska Natives.
- Experts believe the syndrome was previously underdiagnosed due to limited awareness and difficulty linking symptoms to marijuana use.
- There is a call for more research on how high-potency marijuana products and newer forms like vapes and edibles affect young users.
- The report comes from the CDC’s National Center for Injury Prevention and Control based on data from about 7,500 healthcare facilities.
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