The average weight for a 3 year old boy is 14.5kg. Your son's weight falls well below the average. He also has tooth decay and need a calcium supplement. Children with egg allergy are often able to eat biscuits and cake because thses are baked at very high temperatures which alter the egg protein.Also children with milk allergy may be able to eat yoghurt and white cheese because of the fermentation process which makes them less allergenic.
Your son should have tests done to see if he is still allergic to peanuts, tree nuts,eggs and milk.Your son is still highly and frightenly allergic to certain foods even if he no longer gets the severe and rapid reactions he had previously. You should absolutely avoid all of these foods until you have an answer. You musy have a rapidly acting antihistamine at home such as Zyrtec syrup in case he has an allergic reaction in the future.
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