3 year old Male, all summer has had a periodic cough. loose sounding in chest. he can start coughing and it can continue til it gets to the point of vomiting. can continue for hours. sometimes it starts after eating, but it can start at anytime. parents had him to a doctor early summer. (diagnosed allergies). been giving him zertec for allergies. its now October and still happening. Along with this he gets what looks like mosquito bites?? legs, arms, back, chest. there can be as few as three or four to as many as twenty. don t think chicken pox come and go and last for months?? they get real itchy and he says they hurt. will start writing down times, what he eats, activities, wearing. to see if a pattern happens. Grand parent trying to help. thanks for your help.