<human>: My grandson ate some sugar free pudding yesterday and within hours was cramping and suffering from diaharia.  Could he be allergic to milk products?  He couldnt take regular milk as a baby, but soy.  My grandson is 2 yrs old and weigh 27 lbs, otherwise he is healthy.  Thanks
<bot>: Hi, thanks for using Chat Doctor The reaction can be due to : (1) gastroenteritis - infection induced after using the pudding. This would be more likely if other persons who also used it, were sick as well(2)intolerance or an allergic reaction to the foodie he uses other milk products with no problem then it may be some other aspect of the pudding that caused the reaction. If no other persons who used the same pudding are unwell then it is unlikely infection, and you would need to consider the other option. It is possible to assess for allergies by testing at your doctor's office. I hope this helps