What Is Scromiting? Causes, Symptoms, and Treatment

Scromiting is an informal term combining “screaming” and “vomiting,” used to describe the intense episodes of retching and crying out that characterize cannabinoid hyperemesis syndrome (CHS). The condition strikes people who use cannabis heavily over months or years, producing bouts of uncontrollable nausea and vomiting severe enough that patients scream or moan involuntarily from the pain. Although cannabis is widely known for suppressing nausea, chronic use can flip that effect, creating a paradoxical cycle of violent sickness that only stops when the person quits using cannabis entirely.

How Cannabis Goes From Anti-Nausea to Pro-Nausea

The reason scromiting catches people off guard is that cannabis genuinely does reduce nausea in many situations. THC and other cannabinoids have well-documented antiemetic properties, which is part of why cannabis is sometimes prescribed for chemotherapy side effects. But at high doses and with prolonged use, the effect reverses. Cannabinoids produce what researchers call a biphasic response: low doses suppress vomiting, while high or chronic doses can trigger it.

1Cannabis and Cannabinoid Research. Cannabinoid Hyperemesis Syndrome: A Review of Potential Mechanisms

The leading explanation involves the body’s own endocannabinoid system. Prolonged exposure to THC appears to alter the way cannabinoid receptors function, especially the CB1 receptor, which plays roles in gut motility, stress responses, and temperature regulation. Over time, the system gets dysregulated enough that the gut essentially rebels. This paradox trips up both patients and doctors: the substance that once settled a person’s stomach becomes the very thing making them violently ill.

2PubMed. Cannabinoid hyperemesis syndrome: Marijuana is both antiemetic and proemetic

What Scromiting Episodes Actually Look Like

CHS tends to unfold in three stages. During the prodromal phase, a person experiences morning nausea, mild stomach discomfort, and sometimes a vague sense that food does not sit right. This can last weeks or months, and many people actually increase their cannabis use during this stretch because they think it will settle the nausea. Then comes the hyperemetic phase, which is where the “scromiting” label applies. Vomiting becomes relentless, sometimes dozens of times in a single day, and the abdominal pain can be excruciating. The third stage, recovery, begins once the person stops using cannabis, though it can take days to weeks for symptoms to fully resolve.

3PubMed. Cannabinoid Hyperemesis Syndrome: A Review of the Presentation and Treatment

What makes CHS distinctive is a compulsion that would seem bizarre in any other context: patients take extremely hot showers or baths, sometimes for hours at a time, and report that the heat is the only thing that provides relief. One case report described a patient who showered as many as 15 times a day in scalding water.

4PubMed Central. Case of cannabinoid hyperemesis syndrome with long-term follow-up

This learned behavior is so characteristic that clinicians often use it as a diagnostic clue. If a patient with unexplained vomiting is spending an unusual amount of time in hot showers, CHS should be on the radar.

5PubMed Central. The Importance of Accurate Drug Use History in Diagnosing and Managing Cannabinoid Hyperemesis Syndrome: A Case Report

Why Hot Water Helps, and What That Reveals

The hot shower compulsion is not just a quirk. It actually points to the biological mechanism at work. The same receptor system that THC disrupts overlaps with a family of receptors called TRPV1, which respond to heat, capsaicin (the compound that makes chili peppers burn), and certain pain signals. Hot water activates these receptors, and that activation appears to partially counteract the disordered signaling caused by chronic THC exposure. Researchers believe the endocannabinoid system’s role in temperature regulation explains why patients instinctively seek out heat.

6PubMed Central. Cannabinoid hyperemesis relieved by compulsive bathing

This TRPV1 connection has practical consequences for treatment, as we will see. It also explains why the relief from hot showers is real but temporary: the heat addresses a downstream symptom without fixing the underlying problem, which is that the body’s cannabinoid signaling has been chronically overloaded.

Acute Treatment in the Emergency Department

Standard anti-nausea drugs often fail against CHS, which adds to both patient suffering and clinician frustration. Ondansetron, one of the most commonly used anti-vomiting medications in emergency rooms, tends to be far less effective for CHS than for other causes of nausea. A randomized trial comparing intravenous haloperidol to ondansetron found that haloperidol performed significantly better, with patients reporting greater improvement in both nausea and pain, needing fewer backup anti-nausea medications, and leaving the emergency department roughly two and a half hours sooner on average.

7PubMed. Intravenous Haloperidol Versus Ondansetron for Cannabis Hyperemesis Syndrome (HaVOC): A Randomized, Controlled Trial

Topical capsaicin cream has emerged as a surprisingly effective option. Applied to the abdomen, capsaicin activates the same TRPV1 receptors that hot water stimulates, essentially mimicking the shower effect without requiring the patient to stay under running water for hours. One emergency department study found that more than half the patients treated with capsaicin cream achieved meaningful symptom improvement, compared with about a fifth of those who did not receive it, and the capsaicin group was discharged significantly faster.

8PubMed Central. Efficacy of topical capsaicin for cannabinoid hyperemesis syndrome in a pediatric and adult emergency department

Capsaicin cream is inexpensive, over-the-counter, and carries minimal side effects beyond a temporary burning sensation on the skin. For anyone dealing with CHS episodes before reaching a hospital, it can provide some bridging relief, though it is not a cure and should not replace medical evaluation when vomiting is severe.

9PubMed Central. Topical Capsaicin for Treating Cannabinoid Hyperemesis Syndrome

The Only Known Cure

Every review and clinical guideline on CHS reaches the same conclusion: the only reliable long-term treatment is stopping cannabis use entirely. There is no medication, supplement, or dose adjustment that prevents CHS from recurring as long as a person continues to use cannabis.

10PubMed. Cannabinoid Hyperemesis Syndrome: Pathophysiology and Treatment in the Emergency Department

That recommendation sounds straightforward, but the reality is harder. Many people with CHS have used cannabis daily for years and may depend on it for anxiety, insomnia, or chronic pain management. Quitting means confronting withdrawal symptoms and finding alternative treatments for whatever condition they were self-medicating. One review reported that among patients who achieved two weeks of abstinence, roughly seven out of ten relapsed within six months.

11PubMed Central. Cannabinoid hyperemesis syndrome and cannabis withdrawal syndrome: a review of the management of cannabis-related syndrome in the emergency department

Complete resolution of symptoms after quitting is also one of the only ways to confirm the diagnosis definitively. The criteria proposed by the American Gastroenterological Association specify that symptoms should resolve after at least six months of abstinence for the diagnosis to hold.

12Gastroenterology. AGA Clinical Practice Update on Diagnosis and Management of Cannabinoid Hyperemesis Syndrome: Expert Review

Why It Takes So Long to Get Diagnosed

CHS is notoriously underdiagnosed. Part of the problem is that there is no blood test or imaging study that confirms it. It is diagnosed by matching symptoms to a pattern of heavy cannabis use and ruling out other causes of recurrent vomiting. But many patients are reluctant to disclose their cannabis use, and many clinicians do not think to ask, especially in settings where cannabis is legal and socially normalized.

The proposed diagnostic criteria call for vomiting episodes resembling cyclic vomiting syndrome that occur at least three times per year, in a person who has used cannabis more than four times per week for longer than a year. But distinguishing CHS from cyclic vomiting syndrome (CVS), which looks nearly identical in presentation, is tricky. A pediatric cohort study found that patients with CHS tended to be older, had higher blood pressure, and showed signs of dehydration like elevated creatinine and lower potassium compared to those with CVS. A positive urine drug screen was the most obvious differentiator.

13PubMed. Distinguishing Clinical Features of Cannabinoid Hyperemesis Syndrome and Cyclic Vomiting Syndrome: A Retrospective Cohort Study

The clearest way to separate the two is observation over time: if symptoms resolve completely and persistently after cannabis cessation, CHS was the cause.

14PubMed Central. Cannabinoid hyperemesis and the cyclic vomiting syndrome in adults: recognition, diagnosis, acute and long-term treatment

The Cost of Missed Diagnoses

When CHS goes unrecognized, the consequences pile up. Patients cycle through emergency departments repeatedly, undergoing expensive and sometimes invasive workups that find nothing. A study of 17 CHS patients found that, on average, each person visited the emergency department nearly 18 times before receiving the correct diagnosis. Over that period, per-patient costs for emergency visits and imaging averaged close to $77,000, with some patients racking up over $200,000 in radiologic costs alone. Among the group, three underwent unnecessary surgeries, including appendectomies and gallbladder removals.

15PubMed Central. Emergency Department and Radiological Cost of Delayed Diagnosis of Cannabinoid Hyperemesis

These figures come from a small sample, but they illustrate a broader pattern. CHS patients often arrive in distress, their symptoms mimic dozens of other abdominal conditions, and standard anti-nausea drugs do not help, which sends clinicians hunting for rarer diagnoses. Simply asking about cannabis use history could short-circuit this entire cycle.

Complications Beyond Vomiting

Scromiting episodes are not just unpleasant; they can be dangerous. Prolonged vomiting leads to dehydration, which in turn can cause acute kidney injury and electrolyte imbalances. Low levels of potassium, sodium, chloride, and bicarbonate are common during severe episodes and can themselves become medical emergencies. Rare but serious complications include heart rhythm abnormalities, kidney failure, seizures, and, in extreme cases, death.

16JAMA. Cannabinoid Hyperemesis Syndrome

The risk is heightened for people who delay seeking care or who try to manage episodes at home with only hot showers, which can cause burns and further dehydration from sweating. Anyone experiencing uncontrollable vomiting for more than a few hours, especially with signs of dehydration like dark urine, dizziness, or rapid heartbeat, should seek medical attention.

Rising Emergency Department Visits

CHS has gone from a medical curiosity to a growing public health concern. A large study tracking adolescent emergency department visits found that CHS encounters increased by roughly 49% per year between 2016 and 2023, rising from about 160 per million emergency visits to nearly 2,000 per million. The increase was seen in both states with recreational cannabis laws and states without them, though the rate of increase was somewhat steeper in states that had not legalized recreational use.

17PubMed Central. Emergency Department Visits for Cannabis Hyperemesis Syndrome Among Adolescents

The fact that CHS is rising in both legal and non-legal states suggests the trend is not driven solely by legalization. Higher-potency cannabis products, concentrates, and edibles have become widely available through both legal and illicit markets. Today’s cannabis products frequently contain THC concentrations far above what was common a generation ago, and this rising potency likely contributes to CHS risk even among people who have used cannabis for years without issues.

Who Is Most Vulnerable

Not everyone who uses cannabis heavily develops CHS. Researchers have started to investigate why some daily users get sick while others do not, and genetics appears to play a role. A study identified five mutations that were statistically more common in CHS patients than in frequent cannabis users without symptoms. These mutations affected the TRPV1 receptor (the same one involved in the hot-shower response), two dopamine-related genes, a liver enzyme that metabolizes THC, and a transporter protein involved in drug clearance.

18PubMed Central. Cannabinoid hyperemesis syndrome: genetic susceptibility to toxic exposure

This is early-stage research, but it offers a plausible explanation for why CHS is not universal among heavy users. Some people may metabolize THC more slowly or have receptors that are more vulnerable to disruption from chronic cannabinoid exposure. If these findings hold up, genetic testing could eventually help identify people at higher risk before they develop full-blown CHS, though that kind of clinical tool is still years away.

Synthetic Cannabinoids and CHS

CHS is not limited to users of traditional marijuana. Synthetic cannabinoids, sold under names like K2, Spice, and other “legal herb” brands, can trigger the same syndrome. One documented case involved a man who had previously developed CHS from marijuana, quit, and then began smoking synthetic cannabinoid products. He developed the same cycle of severe vomiting and compulsive hot showering. After six months of abstinence from all cannabinoid products, his symptoms resolved completely.

19Mayo Clinic Proceedings. Cannabinoid Hyperemesis Associated With Synthetic Cannabinoid Agonists

Synthetic cannabinoids are often more potent than THC and bind to cannabinoid receptors more aggressively, which may make CHS onset faster or more severe. For people who assume synthetic products are safer because they are marketed as herbal blends, this is a significant risk they are unlikely to be aware of.

Common Misconceptions

Several misunderstandings circulate about CHS that are worth addressing directly. One is that switching to a different strain or product (say, from flower to edibles, or from high-THC to high-CBD strains) will prevent episodes. There is no evidence this works. CHS appears to be driven by cumulative cannabinoid receptor disruption, and while CBD alone may not cause CHS, most commercial cannabis products contain enough THC to perpetuate the cycle.

Another persistent myth is that CHS is simply an allergic reaction to pesticides or contaminants on cannabis rather than a response to cannabinoids themselves. This idea has been debunked by cases involving organically grown cannabis and by the synthetic cannabinoid cases described above. The common denominator is cannabinoid receptor activation, not a specific contaminant.

A third misconception is that CHS is rare enough to be irrelevant for most cannabis users. Given the steep rise in emergency department visits and the expanding availability of high-potency products, CHS is increasingly something that regular users should know about, especially because early recognition during the prodromal stage can prevent the severe hyperemetic episodes that lead to emergency care and potentially dangerous complications.

20PubMed Central. Cannabinoid Hyperemesis Syndrome: A Rising Complication.

What to Do If You Suspect CHS

If you or someone you know uses cannabis regularly and has been dealing with unexplained bouts of severe nausea and vomiting, particularly if hot showers seem to be the only thing that helps, CHS is worth considering. The most useful first step is an honest conversation with a healthcare provider about cannabis use, including how much and how often. Many people underreport their use or do not mention it at all, which makes diagnosis much harder.

During an acute episode, over-the-counter capsaicin cream applied to the abdomen can help bridge the gap before getting medical attention. In the emergency department, asking about haloperidol rather than standard anti-nausea medications may lead to faster relief. And while it is not what most people want to hear, the only path to lasting resolution is stopping cannabis use. For people who find that prospect difficult, asking about substance use counseling or support programs during an emergency visit can be a practical first step. Follow-up care matters: given the high relapse rate, staying connected with a provider after the acute crisis improves the odds of keeping symptoms at bay long-term.