My 4 month old has projectile vomited at least once a day since the day she was born. So far this has been put down to reflux and she has been treated for that but nothing has made much difference to the frequency she is sick. Her weight is healthy so docs not concerned. I'm exclusively breast feeding. The last few weeks she has really improved, but I started to give her some baby rice which I mixed with formula. Her vomiting has started again. Could she be lactose intollerant? Doc or health visitor don't seem to want to go there at this stage. I had cows milk allergy as a child which showed itself as excema. Anyone else know anything about lactose intolerance?