Cyclic vomiting syndrome (CVS) is characterized by periodic bouts of nausea and vomiting that happens at cyclical intervals. It affects all ages, but is more common in children. The condition is quite stereotypical in that there are paroxysms or bouts of vomiting that is recurrent and follows days of normal health.
Causes: There is no definite reason identified, but it is said to have a strong hereditary correlation. Studies have shown mitochondrial heteroplasmic (abnormal growth of mitochondria, which is a cellular component) to be one of the factors that can lead to CVS. The genetic correlation, however, is very difficult to establish, specifically because vomiting and nausea are common symptoms that occur with most conditions in children. And CVS is most commonly noted with conditions like infections and emotional excitement. Infection could be either tooth decay or sinusitis or anything else. Lack of sleep, anxiety, holidays, allergies, overeating, certain foods, menstruation - a host of factors have been shown to induce CVS. There is also a strong association with migraine and conditions that lead to excessive production of stress hormones.
Symptoms: The syndrome (a group of symptoms) usually has 4 phases:
Treatment: Treatment again depends on the severity and the phase at which it is being recognized. If a child has repetitive bouts, then the parent and the doctor would have identified a pattern to it.
However, in most cases of childhood CSV, the pattern will be identified and that helps in better management, both the child/parent and the podiatrist.