Your body is telling you something.
We'll help you listen.
If you've been using cannabis regularly for a year or more and you're dealing with cycles of intense nausea, vomiting, and stomach pain — especially if a hot shower is the only thing that helps — you may have CHS.
It's more common than most people realize. Emergency department visits for CHS doubled between 2017 and 2021. And because most doctors don't know to ask about cannabis use, patients often go years without a real answer.
ClearCHS exists to change that.
Learn how CHS works →What you need to know
Three things every CHS patient deserves to know
It's biological, not personal
CHS happens because long-term cannabis use can change the way receptors in your gut respond to THC. It's a biological process — not a character flaw.
The hot shower thing is real
Compulsive hot showering is one of the most distinctive signs of CHS — and one of the most misunderstood. If this is you, you're not alone and you're not imagining it.
It's often misdiagnosed
CHS closely resembles other conditions like cyclic vomiting syndrome. Many patients spend years in and out of ERs without answers. A proper diagnosis changes everything.
Free Tool · 3 Minutes
Not sure if it's CHS?
Our free self-assessment tool walks you through your symptoms, usage patterns, and history in about 3 minutes. No account needed. No data collected. At the end, you'll get a plain-language result and a downloadable summary you can bring to any doctor.
Take the Free Assessment →This tool is for educational purposes only and does not constitute medical advice.
In the ER right now?
Tell your care team you may have Cannabinoid Hyperemesis Syndrome. Ask about topical capsaicin cream, IV fluids, and whether haloperidol or a benzodiazepine may be appropriate. It's safe to be honest about your cannabis use — it will help them help you faster.
See the full ER guide →Recovery Hub
There's a clear path forward.
Whether you're in the middle of an episode, just getting answers for the first time, or ready to think about what comes next — we have honest, practical guides for every stage. No pressure. No judgment. Just information you can actually use.
"I spent three years in and out of the ER. Every doctor told me something different. Finding out it had a name — that it wasn't just me — changed everything."
— Anonymous, ClearCHS community member
Read more stories →