It's been a tough few weeks for us with Jason gagging non stop. He goes through patches when he is fine and then he goes through weeks when he just gags and gags and gags. It is not food related and not volume related. As soon as he gets any sign of sickness the gagging starts and he is sick so often. We went to the doctor yesterday. He has an ear infection and sinus infection which is causing excess mucous therefore causing him to gag and vomit. Yesterday he vomited the whole day. The doctor suctioned his ear and has given him medicine to hopefully get rid of this. The sleepless nights are bad but the worst part is watching your child gagging and vomiting and there is nothing you can do about it but try and comfort him.