How much vomiting is considered excessive?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Excessive vomiting is defined as frequent, uncontrollable vomiting that lasts for extended periods and can lead to dehydration, electrolyte imbalances, and other serious health complications. It is often a symptom of underlying conditions such as cyclic vomiting syndrome (CVS), hyperemesis gravidarum during pregnancy, gastrointestinal disorders, or migraines. Because the causes vary widely, identifying the root issue is essential to getting the right treatment.

If you or a loved one are experiencing excessive vomiting, don't wait to find answers. Taking a free, instant, online symptom check can help you better understand possible causes, assess urgency, and guide your next steps—whether that's home care, seeing a doctor, or seeking emergency help.

Reviewed for medical accuracy: 07/15/2026

Important Next Steps

Learn what’s causing your excessive vomiting Discover if vomiting needs urgent care See if symptoms suggest a serious cause Find OTC relief for vomiting symptoms Find a doctor for vomiting causes Understand safe home remedies for vomiting Check if vomiting needs medical evaluation

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Explanation

Vomiting becomes excessive when it happens repeatedly and causes problems like dehydration or pain. This can be due to conditions such as cyclic vomiting syndrome, where vomiting occurs in episodes, or hyperemesis gravidarum, which is severe nausea and vomiting during pregnancy.

Conditions Associated with Excessive Vomiting

Cyclic Vomiting Syndrome (CVS):

This condition is characterized by repeated episodes of severe vomiting. It can be challenging to manage and often requires medical attention to prevent complications.

Hyperemesis Gravidarum:

This is a severe form of nausea and vomiting during pregnancy. It can lead to dehydration and weight loss, requiring medical intervention.

Risks of Excessive Vomiting

Dehydration: Loss of fluids can lead to dehydration, which is dangerous if not treated.
Pain: Repeated vomiting can cause abdominal pain and other discomforts.

If someone is experiencing excessive vomiting, it is important to seek medical help to determine the cause and receive appropriate treatment. You can start by taking a free symptom checker assessment to help identify potential causes and next steps.

(References)

Jansen JC, van Dop WA, Fockens P, & Löwenberg M. (2013). Acute upper abdominal pain after excessive vomiting. Nederlands tijdschrift voor geneeskunde, 23985243.
Faucher S, Le Heuzey MF, Rouyer V, & Mouren-Simeoni MC. (2003). [On the subject of the cyclic vomiting syndrome]. Archives de pediatrie : organe officiel de la Societe francaise de pediatrie, 12818770.
Nurmi M, Rautava P, Gissler M, Vahlberg T, & Polo-Kantola P. (2018). Recurrence patterns of hyperemesis gravidarum. American journal of obstetrics and gynecology, 30121224.

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