Baby Diarrhea: Causes, When to Worry and Treatments

In this article, we aim to provide clarity on why a baby might be experiencing diarrhea. 

We will cover the common causes of diarrhea in infants and the signs and symptoms that suggest more than just a dirty diaper. 

We will also examine the dietary factors that may contribute to baby diarrhea and its impact on a baby’s health. 

Towards the end, we will provide suggestions for home remedies, advice on when to seek medical attention, and tips on how to prevent diarrhea in babies.

Common Causes of Diarrhea in Infants

Baby diarrhea can be caused by a variety of factors, many of which are common and resolve on their own. 

However, in rare cases, it might be a sign that something’s not quite right, and your baby may need treatment​​.

One of the most common causes of diarrhea in infants is changes in diet. 

For babies who are breastfed, alterations in the mother’s diet, such as consumption of spicy food or sugary desserts, can change the composition of the breast milk, potentially leading to diarrhea. 

Also, certain medications that the mother is taking, such as antibiotics or certain nutritional supplements, can pass into the breast milk and cause diarrhea in the baby​​.

Both breastfed and formula-fed babies may experience diarrhea as a result of a “stomach bug,” also known as gastroenteritis. 

This is a common cause of diarrhea in babies and can also lead to vomiting and a slight fever. 

Changes in the baby’s diet, especially when solid foods are introduced around 6 months of age, can also cause temporary diarrhea. 

Certain medications given to the baby, such as antibiotics for bacterial infections or medications for parasite infections, may also loosen the baby’s bowels and cause diarrhea​1​.

In the case of formula-fed babies, certain formula ingredients or a change in formulas can lead to diarrhea. 

Some babies might find certain formulas harder to digest, leading to diarrhea until they adjust to the new formula. 

Milk allergy or intolerance can also cause diarrhea in formula-fed babies. 

It’s worth noting that while milk allergy is relatively uncommon, milk intolerance can occur temporarily after the baby has had a stomach bug​1​.

Lastly, although very rare, serious illnesses like certain intestinal infections (like Shigella colitis), C. difficile infection, cystic fibrosis, and neuroendocrine tumors can also cause diarrhea in babies.

Signs and Symptoms: When It’s More Than Just a Dirty Diaper

Diarrhea in babies can be a bit tricky to identify, especially for new parents, as newborns naturally have soft and frequent stools. 

However, there are some key signs that may indicate your baby is dealing with diarrhea. 

These include a sudden increase in the frequency of bowel movements, a change in the color or consistency of the stools (usually watery or containing mucus), and a foul smell. 

Apart from changes in stools, your baby might also seem unusually fussy, show signs of dehydration (like fewer wet diapers, dry mouth, sunken eyes or fontanel, or a lack of energy), or have a fever. 

It’s important to note that these symptoms can also accompany other health concerns, so if you’re in doubt, always consult with a healthcare provider.

Dietary Factors Contributing to Baby Diarrhea

Several dietary factors can contribute to diarrhea in babies. 

For breastfeeding babies, anything the mother consumes can affect the baby’s digestion. 

This includes spicy foods, caffeine, alcohol, and certain medications. 

In some cases, a baby may also be sensitive or allergic to a protein in the mother’s milk, typically cow’s milk protein. 

For formula-fed babies, a sensitivity or allergy to a component of the formula can cause diarrhea. 

As babies start eating solids, various foods can upset their immature digestive system and cause diarrhea. 

These can include high-fiber fruits and vegetables, juice, and foods that are high in sugar. 

It’s important to introduce new foods gradually and monitor your baby for any changes in their bowel movements.

Home Remedies and Hydration Techniques

1. Keep the Baby Hydrated

Hydration is crucial when your baby has diarrhea. If you’re breastfeeding, continue to do so. If you’re formula-feeding, continue to prepare the formula as normal and feed your baby.

2. Rehydration Solutions

You can use oral rehydration solutions (ORS), such as Pedialyte, to replenish fluids and electrolytes lost through diarrhea. However, always consult your pediatrician before giving your baby an ORS.

3. Appropriate Foods

If your baby has started on solids, foods that are easy on the stomach can help soothe diarrhea. These can include bananas, rice, applesauce, and toast (often remembered as the BRAT diet).

4. Frequent Diaper Changes

Diarrhea can cause diaper rash. Change your baby’s diaper often to prevent this, and consider using a diaper rash cream as a preventive measure.

5. Avoid Certain Foods

Avoid feeding your baby foods that could potentially worsen diarrhea. These include fruit juices, cow’s milk (other than the dairy in their formula), fried foods, and spicy foods.

6. Comfort and Rest

Ensure your baby is comfortable and getting plenty of rest. Extra cuddles may be required as your little one may feel uncomfortable and irritable.

Remember, these home remedies and techniques are generally safe, but always consult your baby’s pediatrician if you have concerns. 

Diarrhea can lead to dehydration, which can be serious in infants. 

Signs of dehydration include dry mouth, crying without tears, fewer wet diapers, and increased sleepiness or irritability. 

If your baby shows any signs of dehydration, contact your healthcare provider immediately.

When to Seek Medical Attention

While occasional mild diarrhea is usually not a cause for concern and can be managed at home, there are certain situations where you should seek medical attention. 

If your baby shows signs of dehydration, has a high fever, has blood in their stool, is under 3 months old and has diarrhea, or if the diarrhea lasts for more than 24 hours, you should consult a healthcare provider. 

Additionally, if your baby is lethargic, refusing to eat, or if you have any other concerns about their health, it’s always a good idea to seek professional advice. 

Diarrhea can be a symptom of various conditions, from simple dietary changes to more serious infections, so it’s important to get a proper diagnosis if your baby’s symptoms persist or worsen.

Preventing Diarrhea in Babies

1. Maintain Good Hygiene

Make sure to wash your hands regularly, especially before handling your baby or preparing food. This can help prevent the spread of germs that could cause diarrhea.

2. Safe Food Practices

If your baby has started solids, ensure that all food is prepared safely. This means thoroughly washing fruits and vegetables, cooking meats properly, and promptly refrigerating leftovers.

3. Appropriate Milk Feeding

If your baby is less than a year old, avoid giving them cow’s milk. Stick to breastmilk or formula unless directed otherwise by your pediatrician.

4. Gradual Introduction of New Foods

When introducing new foods to your baby, do so one at a time and wait a few days before introducing another new food. This allows you to monitor any potential reactions, including diarrhea, that might be tied to a specific food.

5. Stay Updated on Vaccinations

Make sure your baby’s vaccinations are up to date. Some vaccines can protect against viral infections that cause diarrhea.

6. Cautious Use of Antibiotics

While antibiotics can be necessary for certain illnesses, overuse can disrupt the balance of good bacteria in your baby’s gut, potentially leading to diarrhea. Use antibiotics only when prescribed by a healthcare professional.

Remember, it’s not always possible to prevent diarrhea entirely, especially as your baby begins to explore the world around them. Always consult your pediatrician if you have concerns about your baby’s health.

Frequently Asked Questions (FAQs:)

Q1: Can teething cause diarrhea in babies?

A1: While some parents report loose stools during teething, there’s no scientific consensus that teething directly causes diarrhea. If your baby has persistent diarrhea, it’s best to consult a healthcare provider to rule out other causes.

Q2: How should I clean my baby during a diaper change to prevent diaper rash when they have diarrhea?

A2: Use a gentle, fragrance-free baby wipe or a damp cloth to clean your baby. After cleaning, allow the area to air dry before putting on a new diaper. Applying a barrier cream can also help protect your baby’s skin from irritation.

Q3: Can diarrhea affect my baby’s sleep?

A3: Yes, discomfort from diarrhea can disrupt a baby’s sleep. Regular diaper changes and keeping your baby hydrated can help manage this.


In summary, diarrhea in babies can be caused by a variety of factors, and understanding these can help you prevent and manage this condition. 

Keep an eye on your baby’s symptoms and seek medical help if diarrhea persists or if your baby shows signs of dehydration. 

The health of your baby’s digestive system is crucial, and ensuring a balanced diet and good hydration can go a long way in keeping them healthy.

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