yes,tomato is one of the forbidden food ,besides spicy,greasy food
You need to baby your stomach
,use your common sense,if it is difficult to digest or irritable to your stomach lining,you need to cut back eating them.
water is neutral,fruits are mostly acidic,pasta and raw veggies are hard to digest,too much meat is also hard to digest.
white bread ,water,rice,plain potato ,fish are easy on the stomach.