Introduction

Starting solids is an important period in which a baby meets foods other than breast milk or formula for the first time. The three-day rule is a practical approach used to watch for possible allergic or digestive reactions after a new food is given.

What is it?

The three-day rule means giving the same new food on its own for a few days and watching the baby over that time. Reactions such as redness, diarrhoea, vomiting, a rash or unsettledness are easier to spot that way.

Signs to Watch For

  • A rash or redness on the skin
  • Vomiting or diarrhoea
  • Swelling of the lips or face
  • Extreme unsettledness
  • Refusing the food

What Can Parents Do?

  • Try new foods one at a time
  • Start with small amounts in the first few days
  • Give new foods in the morning or during the day so you can watch through the day
  • If there is a reaction, stop the food and get a doctor's opinion
  • Do not add several new foods at once

When Should You See a Doctor?

  • If there is difficulty breathing
  • If a widespread rash or swelling develops
  • If there is severe vomiting, blood in the stool or marked listlessness
  • If there is a history of serious allergy in the family

Summary

The three-day rule is a simple and useful method that makes it easier to observe while starting solids. The aim is not to be afraid, but to understand clearly how each food suits your baby.

This app is not a substitute for medical advice, diagnosis or treatment. Always consult your doctor or pediatrician for decisions about your baby's health.