CVS is typically in very young children. I actually have a friend and her child has it unfortunately, its a terrible condition! Typically they out grow from it between the ages 7-10yrs. More common in female then male. And it causes a really bad migraine and severe pain in the stomach, which the drs say its like the stomach has a migraine. I guess because your cycle just like chronic migraine suffers do. It usually causes a lot of admissions to the hospital because of pain and meds needing to be adjusted. Even though my friend child is very young, hes on typical drugs like adults with doses just as high, gabapentin, DHE, pain meds etc.. to try and stop a CVS cycle from happening.