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Vomiting with heavy cannabis use, relieved by hot showers

Also called: Cannabinoid hyperemesis syndrome, CHS

Repeated vomiting in people who use cannabis heavily, relieved by hot showers, is cannabinoid hyperemesis syndrome. The only cure is stopping cannabis. Severe vomiting can cause dangerous dehydration.

Common causesHeavy, long-term cannabis use
Usually serious?Can be
Get checked ifVomiting won't stop, or signs of dehydration
If you think it's an emergency, call 911.Thinking about suicide? Call or text 988.

Overview

CHS causes cycles of severe nausea, vomiting, and belly pain in people who use cannabis daily for months or years.

Many people find relief with hot showers or baths. Symptoms go away after stopping cannabis.

When to get medical care

Call 911Confusion, fainting, or very little urine.
Get care todayVomiting that won't stop. Can't keep fluids down.
See a doctor soonRepeated episodes.

Causes

Caused by heavy cannabis use.

OwieClear has pages on 1 condition that can cause vomiting with heavy cannabis use, relieved by hot showers. Each shows how soon to get care.

Common causes

What you can do at home

  • Stop using cannabis.
  • Sip fluids.

Medicines

IV fluids and anti-nausea medicines may be needed. Capsaicin cream can help.

At the doctor

Diagnosed by history.

Questions you may be asked

  • Cannabis use
  • Vomiting pattern

The exam

A physical exam.

Tests

  • Blood tests

Prevention

Avoid heavy use.

  • Stop or reduce cannabis

Check your symptoms

Most symptoms have more than one possible cause. The symptom checker looks at all of your symptoms together, plus your age, and shows how soon to get care.

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Sources

Last updated 2026-11-13.