The main symptoms of cyclic vomiting syndrome are sudden, repeated attacksβcalled episodesβof severe nausea and vomiting. You may vomit several times an hour. Episodes can last from a few hours to several days. Episodes may make you feel very tired and drowsy. Each episode of cyclic vomiting syndrome tends to start at the same time of day, last the same length of time, and happen with the same symptoms and intensity as previous episodes.
Episodes may begin at any time but often start during the early morning hours. You should seek medical help right away if you have any signs or symptoms of dehydration during the vomiting phase.
These signs and symptoms may include. If you are a parent or caregiver of an infant or child, you should seek medical care for them right away if they have any signs and symptoms of dehydration during the vomiting phase.
However, some experts believe the following conditions may play a role:. Eating certain foods, such as chocolate, cheese, and foods with monosodium glutamate MSG may play a role in triggering episodes.
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