About Cyclic Vomiting Syndrome
What Cyclic Vomiting Syndrome?
Cyclic vomiting syndrome (CVS) is a rare disorder characterised by recurrent episodes of severe vomiting that occur with predictable cycles or patterns. It primarily affects children but can progress into adulthood. The exact cause of CVS is not well understood, but it is believed to involve dysregulation of the brain-gut axis, leading to abnormal functioning of the digestive system.
Cyclic Vomiting Syndrome Diagnosis
How Do We Diagnose Cyclic Vomiting Syndrome?
The International Classification of Headache Disorders (ICHD) provides diagnostic criteria for cyclic vomiting syndrome, which include recurrent, severe episodes of vomiting lasting hours to days, with symptom-free intervals between episodes. Blood tests may be performed to evaluate electrolyte levels, liver function, and rule out other conditions that may cause similar symptoms.
It is important to exclude other potential causes of vomiting and establish a pattern of recurrent episodes for a diagnosis of cyclic vomiting syndrome.
Cyclic Vomiting Syndrome Symptoms
There are typically symptom-free intervals between episodes, during which the individual feels well.

Intense Nausea
Recurrent episodes of severe vomiting
Abdominal pain

Increased Sensitivity
Sensitivity to triggers such as stress, certain foods or fasting

Fatigue
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