Food Allergy Diaper Rash – Everything You Need to Know

  • By: Julie Miller
  • Time to read: 7 min.

Many parents are concerned about food allergies and whether they can cause diaper rash and rightfully so.

A food allergy can cause diaper rash. It’s important to know if it’s the exact cause of your baby’s diaper rash to know the right course of treatment, to know what food and if it’s the allergy or a diaper rash.

How to Tell if My Baby Is Having an Allergic Reaction to Food

How to Tell if My Baby Is Having an Allergic Reaction to Food

The first thing you’ll want to do if you think your baby is having an allergic reaction to food is to take note of any similar symptoms they’re experiencing. Many babies experience hives, swelling, and difficulty breathing.

Other symptoms include vomiting and diarrhea. Another common symptom of a food allergy is rash. If your baby is displaying any of these symptoms, it’s important to call their doctor right away.

You should also try to identify what food they may have reacted to. If you can, write down everything they ate in the last 24 hours. This will help their doctor make a diagnosis.

The first sign of an allergic reaction can take minutes or several hours. If your child is having a severe allergic reaction, they may need to be treated with epinephrine (a medication that can help reduce swelling and open up the airways). If you have an epinephrine auto-injector (such as an EpiPen), you should use it right away. Then, call 911 and follow their instructions.

Allergic reactions to food can be scary, but by knowing the signs and symptoms to look out for, you can help keep your baby safe.

Can Food Allergies Cause Diaper Rash?

Yes, food allergies can cause diaper rash. If your baby is allergic to a certain food, it can cause an inflammatory response in your baby’s skin. This can lead to the development of red, irritated skin.

Food allergies are a leading cause of diaper rash. The proteins in some foods can cause an immune reaction that leads to inflammation and irritation in the skin. Common food allergens include cow’s milk, soy, wheat, eggs, nuts, and seafood.

Even if your baby isn’t ready to eat solid foods, your child may develop diaper rash due to the foods you have eaten.

Diaper rash is most commonly seen in babies who are between the ages of four and 15 months old.

What Are the Different Types of Diaper Rashes on Baby’s Skin?

What Are the Different Types of Diaper Rashes on Baby’s Skin?

There are different types of diaper rashes that can affect a baby’s sensitive skin. Some are more common than others, and they can vary in severity.

It’s important to be able to identify the different types of diaper rash, so you can treat them properly.

Diaper Dermatitis

Diaper dermatitis is a general term used to describe various skin rashes in the diaper area. It is often described as bright red skin or sometimes small red dots. The three most common types of diaper dermatitis are contact dermatitis, irritant dermatitis, and candidiasis or yeast infection.

Contact Dermatitis

Contact dermatitis is caused by an allergic reaction to a new detergent, fabric softener, or wipes. It can also be caused by sensitivities to dyes, fragrances, or other chemicals in the diapers, wipes, or creams.

Irritant Dermatitis

Irritant dermatitis is the most common type of diaper dermatitis in little children. It is caused by prolonged contact with urine and feces, which can irritate the skin and lead to inflammation.


Candidiasis is a yeast infection that can occur in the diaper area. It is most commonly seen in babies who are taking antibiotics or have a weakened immune system. Antibiotic use kills both good and bad bacteria that prevent the overgrowth of yeast.

Yeast infections are typically treated using antifungal creams.

Food Allergy

When a baby has food allergies, their immune system overreacts to certain proteins in foods. This can cause a range of symptoms, including diaper rash.

Diaper rash caused by food allergies is usually characterized by red, itchy patches of skin. In severe cases, the rash may blister or bleed. If your baby has a food allergy, it’s important to work with a doctor to identify the offending food and develop a plan to avoid it.


Eczema (seborrheic dermatitis) is a condition that causes the skin to become irritated and inflamed. It can occur at any age but is most common in babies and young children. Eczema is not contagious, and it is not caused by an allergy.

Unfortunately, there is no cure for eczema, but it can be managed with medication and lifestyle changes.

What Does an Allergy Diaper Rash Look Like?

If parents suspect their babies have an allergy diaper rash, there are a few things you can look for.

First, does the rash have raised bumps or blisters? If so, it’s likely not an allergy. Allergy rashes are usually flat and red.

Second, is the rash only on your baby’s bum? If so, it’s probably not an allergy. Allergies can cause rashes anywhere on the body.

Third, does the rash seem to be spreading? If so, it could be an infection and you should consult your doctor.

Allergy rashes can be very uncomfortable for your little one and may require medication to clear up.

What Foods Cause Diaper Rashes?

What Foods Cause Diaper Rashes?

There are many different solid foods that can cause nappy rashes in babies. Some of the most common culprits are acidic fruits like oranges and pineapple, dairy products, and processed foods.

If your baby is suffering from a diaper rash, it’s important to figure out which foods are causing it and avoid them.

Citrus Fruits

Citrus fruits can cause diaper rash in some babies. The acidic nature of these fruits can irritate the skin, especially if the baby has sensitive skin. If you notice that your baby’s diaper rash gets worse after eating citrus fruits, it is best to avoid them. There are plenty of other healthy foods that your baby can eat that will not cause diaper rash.

Tomatoes and Tomato-based Products

Tomatoes and tomato-based products can cause diaper rash. The acidity in tomatoes can irritate your baby’s skin, and if they eat too many tomatoes, the acid can also give them an upset stomach. If your baby has a diaper rash, you should avoid giving them tomatoes until it clears up.

Dairy Products

Dairy products can cause diaper rash in some babies. The proteins in milk can irritate a baby’s delicate skin, especially if they are already prone to rashes. If you think your baby’s rash may be caused by dairy, you may need to switch to a hypoallergenic formula or eliminate dairy from your baby’s diet.


Soy diaper rash is caused by a reaction to the proteins in soy. Soy protein intolerance is more common in infants than adults and can cause a variety of symptoms, including diarrhea, vomiting, and skin rashes. If your baby has a soy allergy, you should avoid giving them soy-based formula or soy-containing foods. Talk to your doctor if you have any concerns about your baby’s health.

Soy protein intolerance is a rare condition, but it can be serious.

How to Treat and Prevent Diaper Rash Caused By Food Allergies

If your child develops diaper rash due to a food allergy, there are a few things you can do to treat it. No need to panic, most of the time you can beat the rash with home treatment and a few changes to your diapering routine. Here are a few things you can do:

  • Frequent diaper changes help with treating diaper rash. Soiled and wet diapers with your baby’s poop in them can cause skin irritation. This will help to keep the area clean and dry.
  • Depending on your child’s bowel movements, you may need to change it more often than you’re used to.
  • Avoid using any baby lotions or baby wipes on the area when changing diapers. These products contain harmful chemicals that are considered irritants.
  • Use breathable disposable diapers to prevent creating a moist environment.
  • If you’re using soft cloth diapers, avoid using fabric softeners and dryer sheets when you wash them. Use mild laundry soap and warm water and run them in an extra rinse cycle to remove traces of detergent.
  • Use a diaper cream or ointment that contains zinc oxide with each diaper change on your baby’s bottom to help soothe the area and protect it from further irritation.
  • When you change diapers, make sure your baby’s diaper area is dry before putting on fresh diapers. Pat dry using a large towel.
  • Give your baby some diaper-free time each day to let their inflamed skin air out and heal.
  • Make a list of foods that your baby has food sensitivities. Avoid giving these foods to your baby especially if she already has a rash. Likewise, don’t introduce new foods while the rashes are still present.


Could your baby’s diaper rash be caused by a food allergy? It’s a question that many parents ask, and the answer is yes, food allergies can cause nappy rash.

In this article, we explored some of the most common food allergens that can trigger a nappy rash in babies, as well as some tips for how to treat and prevent one.

If you think your baby may have a food allergy, please consult with your doctor for diagnosis and treatment.

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