The CDC found nearly 200,000 emergency visits involving cannabis hyperemesis from 2023 to 2026.

Reported rates rose sharply after CHS received its own diagnostic code in October 2025.

People aged 15 to 24 had the highest rate of CHS-related emergency visits.

A new report from the Centers for Disease Control and Prevention (CDC) is drawing attention to cannabis hyperemesis syndrome (CHS), a condition associated with frequent cannabis use that causes recurrent episodes of severe nausea, vomiting, and abdominal pain.

From January 2023 through May 2026, the CDC identified 199,565 emergency department visits involving CHS, with the proportion of these visits increasing substantially after a new diagnostic code for the syndrome was introduced in October 2025.

The timing is important because the new figures do not necessarily mean that CHS suddenly became much more common. Before October 2025, there was no specific diagnostic code for the condition, so doctors had to identify possible cases using combinations of codes for vomiting and cannabis-related diagnoses. Once CHS received its own code, it became much easier to recognize and record.

The CDC therefore believes that at least part of the increase reflects better detection of a condition that had probably been underestimated.

That distinction does not make the findings less relevant. The higher numbers give healthcare professionals a better indication of how often CHS is reaching emergency departments and highlight a condition that can remain unrecognized even in people who have been treated for repeated episodes of vomiting.

What is cannabis hyperemesis syndrome?

Cannabis hyperemesis syndrome is characterized by repeated episodes of intense nausea, vomiting, and abdominal pain in people who use cannabis frequently. The episodes can be severe enough to cause dehydration and electrolyte........

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