The symptoms of cyclic vomiting syndrome include: Severe vomiting that occurs several times an hour & lasts less than a week. Three or more episodes of vomiting, with no apparent cause, in the past yr. Other symptoms during a vomiting episode may include: Abdominal pain Diarrhea Fever Dizziness Sensitivity to light The intervals between vomiting episodes are generally symptom-free. But some people experience mild to moderate nausea or abdominal or limb pain between episodes. The cause of cyclic vomiting syndrome is unknown. But the bouts of vomiting that characterize the syndrome can be triggered by: Colds, allergies or sinus problems Emotional stress or excitement, especially in children Anxiety or panic attacks, especially in adults Foods, such as chocolate or cheese Overeating or eating right before going to bed Hot weather Physical exhaustion Menstruation Motion sickness The relationship between migraines and cyclic vomiting syndrome isn't clear. But many children with cyclic vomiting syndrome have a family history of migraines or have migraines themselves when they get older. In adults, the association between cyclic vomiting syndrome and migraine may be lower.