As marijuana becomes more available and socially accepted, many people see it as a natural way to relax, sleep, or manage pain. But for some frequent, long‑term users, marijuana can trigger a little‑known condition called cannabinoid hyperemesis syndrome (CHS); it is characterized by repeated episodes of severe nausea, vomiting, and belly pain that can be frightening and disabling.

CHS usually appears after years of regular cannabis use, often daily or near‑daily. Early on, people may notice morning nausea, decreased appetite, or vague stomach discomfort, but still go about their day. Over time, symptoms can progress into sudden hyperemetic episodes: relentless vomiting, intense stomach pain, and an inability to keep down food or fluids. Many people with CHS discover that very hot showers or baths briefly relieve their symptoms, sometimes leading them to bathe compulsively.

Because cannabis is often used to ease nausea, people and providers may not immediately suspect it as the cause. That means many individuals with CHS bounce between emergency rooms and specialists, undergoing multiple tests without clear answers. During severe episodes, dehydration and electrolyte imbalances can become medical emergencies requiring IV fluids and monitoring.

The most important thing to know: the only proven way to stop CHS for good is to stop using cannabis. Hot showers, over‑the‑counter remedies, and even prescription anti‑nausea medications may offer only partial or temporary relief. Once cannabis is stopped completely, most people improve over days to weeks, and the vomiting episodes usually do not return unless cannabis use resumes.

If you think you might have CHS, be honest with your health care provider about how often and how long you have used cannabis. This information helps them make an accurate diagnosis, rule out other serious conditions, and offer safer, more effective care.