Why does the baby spit up when held straight a little?

Patient's question:

Why does a three-month-old baby vomit when held upright a bit?
It hasn't been treated yet. Why does a three-month-old baby vomit when held upright a bit? Is there a problem?

Doctor's answer:

Spitting up is very common in infancy and can be stabilized by adjusting feeding methods. The following methods can help:
1. Feed in adequate amounts but avoid overfeeding. Feed small, frequent meals to reduce the pressure on the stomach.
2. After each feeding, hold the baby upright on your shoulder and gently pat their back. This helps expel air swallowed into the stomach, reducing stomach pressure.
3. Do not feed too quickly or too eagerly. Pause halfway through to ensure the baby can breathe more comfortably.
4. The nipple of the bottle should have evenly spaced holes. If the holes are too small, the baby will have to suck hard, making it easy for air to be drawn into the mouth and then into the stomach. If the holes are too large, the baby may be flooded with milk, obstructing the airway.
5. After feeding, do not let the baby lie flat immediately. Instead, let them sit upright for a while and gently pat their back. When lying down, prop the baby’s upper body up high, preferably on their right side, to prevent stomach contents from flowing out.
6. After feeding, avoid letting the baby get excited or moving them randomly.

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