5 Signs Your Baby Might Have a Food Allergy

Introducing new foods to your baby is an exciting milestone, but it can also be nerve-wracking—especially if you’re worried about allergies. Food allergies in babies are more common than many parents think, and early detection is key to keeping your little one safe and healthy.

If you’re starting solids or transitioning to new foods, it’s important to know the early warning signs of a potential food allergy. Here are five common symptoms to watch out for.

1. Skin Reactions: Rashes, Hives, or Redness

One of the earliest signs of a food allergy is a skin reaction. You might notice:

Raised red bumps or hives
Eczema flare-ups that worsen after eating
General redness or irritation around the mouth

These reactions can appear within minutes or hours of eating the allergenic food. If they persist or spread quickly, it’s time to consult a pediatrician.

2. Digestive Issues: Vomiting, Diarrhea, or Gas

Food allergies can disrupt your baby’s digestive system. Look for signs like:

Repeated vomiting shortly after eating
Diarrhea or frequent, watery stools
Excessive gas or bloating

While occasional tummy troubles are normal, consistent issues after eating specific foods may signal a problem.

3. Respiratory Symptoms: Coughing, Wheezing, or Nasal Congestion

Some food allergies can trigger respiratory symptoms, which may include:

Runny or stuffy nose
Wheezing or difficulty breathing
Coughing shortly after eating

If these symptoms appear rapidly after introducing a new food, especially alongside other signs, seek immediate medical help.

4. Swelling of the Face, Lips, or Tongue

Swelling—especially around the face—is a serious sign of a food allergy and can be life-threatening. Pay attention to:

Puffiness around the eyes
Lip or tongue swelling
Drooling or difficulty swallowing

This could indicate a severe allergic reaction, known as anaphylaxis, and requires emergency care.

5. Behavioral Changes: Fussiness or Refusal to Eat

Babies can’t tell you when something doesn’t feel right, but their behavior might. Watch for:

Refusing food they previously enjoyed
Crying or irritability shortly after meals
Seeming uncomfortable or restless during feeding

While not as definitive as physical symptoms, sudden changes in behavior—especially combined with any of the signs above—should be taken seriously.

What to Do If You Suspect a Food Allergy

Stop feeding the suspected food immediately.
Keep a food diary to track what your baby eats and any symptoms that follow.
Consult your pediatrician or allergist for advice and possible allergy testing.
In case of severe reactions (difficulty breathing, extreme swelling), seek emergency medical attention immediately.

Common Allergy-Triggering Foods in Babies

Some of the top allergenic foods include:

Cow’s milk
Eggs
Peanuts and tree nuts
Soy
Wheat
Fish and shellfish

According to pediatric experts, introducing these foods slowly and one at a time (starting around 6 months) can help monitor for allergies while still supporting healthy development.

Helpful Resources on Feeding and Baby Health:

Find more expert tips under our Baby Health & Wellness blog category.

Final Thoughts

While food allergies can be scary, knowing what to look for can help you act fast and keep your baby safe. Pay close attention when introducing new foods and always consult your pediatrician if you notice any signs.

Need allergy-friendly baby food, formula, or gentle skincare products? Visit Kiddie Kloset for trusted baby care essentials that support your child’s well-being from day one.

5 Signs Your Baby Might Have a Food Allergy