A food allergy happens when the immune system has a negative reaction to the proteins in a certain food. Many allergies often start in childhood. As you start introducing solids to your baby, it is important to know the signs of an allergy.
If your baby has a food allergy, you will usually notice the signs between 2 minutes to 2 hours after he eats. Some signs are mild, such as itching or skin irritation. Other reactions are very serious (and dangerous) such as trouble breathing or fainting. While food allergies can be scary for parents, many children eventually outgrow them.