{"id":"018a504de5527837cbfe93913b733685","slug":"why-does-my-9-month-old-throw-up-formula-every-time-i-warm-it-in-the-microwave","question":"Why does my 9-month-old throw up formula every time I warm it in the microwave?","answer":"Microwaving formula can create uneven heating — some parts become very hot while others stay cool, and your baby may reject the inconsistent temperature or overheat their mouth, triggering a gag reflex. More importantly, microwaving doesn't reliably reach the safe temperature needed to kill bacteria in powder formula, which matters for your baby's health even if the vomiting is the immediate problem you're seeing.\n\nThe safest approach is to prepare formula with boiling water from a kettle (let it cool slightly before mixing), then warm the prepared bottle in a bowl of warm water if your baby prefers it warm. This gives you even heat throughout and the bacterial protection that matters most. You might also check that you're measuring powder accurately — using a kitchen scale rather than scooping by hand helps prevent formula that's too concentrated, which can contribute to digestive upset. A small adjustment in how you prepare and warm bottles often stops the vomiting within a few feedings.","sources":"[]","thread_json":null,"topic":"formula-feeding","view_count":0,"created_at":"2026-10-05T23:00:36.952Z"}