Very few babies are allergic to tomatoes, but if the child is hypersensitive, then it is likely that he or she will be allergic to tomatoes as well. If you want to be sure, you can go to the hospital for allergen testing to check if you are allergic to this food. You can also observe your baby’s symptoms after eating tomatoes. For example, some children may get rashes, itching and asthma after being exposed to allergic foods, which are all symptoms of allergy. If your baby has similar allergy symptoms after eating tomatoes, it is likely to be caused by an allergy to this food and should be avoided as much as possible. If the child does not have any abnormalities after eating these foods, he or she will not be allergic. There are also some babies who have allergic symptoms after ingesting foods such as diarrhea and enteritis, so it is important to observe whether the child has these symptoms, and if he or she has similar conditions, it is also likely to be caused by allergies.