If you suspect that your baby has a reaction from some food avoid it for a few days and then reintroduce that food again to see how your baby reacts and handles it. If you see any of the following symptoms it means your baby may be allergic to something.
Eczema
Excessive Crying or Fussing after a feed
Excessive Gas
Excessive Spitting
Diarrhea
Rashes
Congestion
Trouble Sleeping