﻿ Cyclic Vomiting Syndrome (CVS) Symptoms, Causes, Treatment - What are the four phases of cyclic vomiting syndrome? - MedicineNet

Cyclic Vomiting Syndrome (CVS) (cont.)

What are the four phases of cyclic vomiting syndrome?

Cyclic vomiting syndrome has four phases:

Symptom-free interval phase. This phase is the period between episodes when no symptoms are present.

Prodrome phase. This phase signals that an episode of nausea and vomiting is about to begin. Often marked by nausea - with or without abdominal pain - this phase can last from just a few minutes to several hours. Sometimes, taking medicine early in the phase can stop an episode in progress. However, sometimes there is no warning; a person may simply wake up in the morning and begin vomiting.

Vomiting phase. This phase consists of nausea and vomiting; an inability to eat, drink, or take medicines without vomiting; paleness; drowsiness; and exhaustion.

Recovery phase. This phase begins when the nausea and vomiting stop. Healthy color, appetite, and energy return.

How is cyclic vomiting syndrome diagnosed?

Cyclic vomiting syndrome is hard to diagnose because no tests - such as a blood test or X-ray - can establish a diagnosis of cyclic vomiting syndrome. A doctor must look at symptoms and medical history to rule out other common diseases or disorders that can cause nausea and vomiting. Making a diagnosis takes time because the doctor also needs to identify a pattern or cycle to the vomiting.

How is cyclic vomiting syndrome treated?

Treatment varies, but people with cyclic vomiting syndrome generally improve after learning to control their symptoms. People with cyclic vomiting syndrome are advised to get plenty of rest and sleep and to take medications that prevent a vomiting episode, stop one in progress, speed up recovery, or relieve associated symptoms.





