What not to eat? Your doctor will probably want to do an elimination test with you. Gluten and sugar are believed to worsen eczema, but it’s a good idea to find out what your specific triggers are. As for foods you should eat, the list is long and delicious! These 7 foods can also help fight off the red and scaly. If you want to find out more about fighting eczema with food, check out Karen Fischer’s book, The Eczema Diet.