A 1-month-old baby has no allergic symptoms if he has eaten ribs and shrimp before. You can eat together now, but if you haven't eaten before, try not to eat together. If you are allergic, I don't know what the reason is. And don't eat too much at a time to avoid the symptoms of vomiting and diarrhea, so that complementary food can't be added, which will also affect the baby's health.