Baby Diarrhea: Causes, Symptoms, and Treatment


It's normal for your baby to have varying kinds of poop, even the occasional loose stool. However, if what comes out is very watery and happens again and again, your baby most likely has diarrhea.

Diarrhea is uncomfortable and unpleasant, to say the least, especially when it comes to changing your baby or toddler's diaper. Find out what causes diarrhea, how you can treat or even prevent this condition, and when you may need to see your baby's healthcare provider for guidance.

What Is Diarrhea?

Diarrhea happens when the intestinal lining is irritated and can't properly digest or absorb the nutrients from the food your baby eats. The stools become watery and loose, and your baby may have more frequent bowel movements. Diarrhea can last for a few days, or up to a few weeks if it's chronic.

Along with the water in the stools, your child can also lose lots of important minerals and salts, which can result in dehydration. This is why it's important to rehydrate your little one with the right kind of fluids, avoiding sweetened drinks and fruit juices, which can further irritate the intestines as the sugars draw out even more water.

During the time your baby has diarrhea, their healthcare provider may suggest giving a store-bought electrolyte solution to rehydrate your little one.

Diarrhea and Related Signs and Symptoms

Diarrhea consists of loose and/or watery stools that occur frequently.

Other signs and symptoms that can accompany diarrhea include:

  • fever

  • blood or mucus in the stool

  • bloating

  • nausea (your older toddler may be able to tell you they feel sick)

  • vomiting

  • refusing to feed or eat

  • weight loss

  • dehydration

  • abdominal cramping or pain (something your toddler may be able to tell you they feel)

  • urgent feeling to pass a bowel movement (something your toddler may tell you).

Causes of Diarrhea

In young children, the main causes of diarrhea are viruses (such as norovirus and rotavirus); other causes of diarrhea include:

  • Food poisoning

  • A bacterial or parasitic infection (in the gastrointestinal tract, urinary tract, or middle ear)

  • Side effects from medications (like antibiotics)

  • A food allergy (for example, an allergy to milk)

  • Lactose intolerance

  • Celiac disease or inflammatory bowel disease

  • Drinking too much fruit juice (sugary drinks lead to the intestines drawing in more water, resulting in loose, watery stools).


The kind of treatment your baby’s healthcare provider recommends will depend on their diagnosis of what’s causing the diarrhea in the first place, and how severe it is.

There is no medication for diarrhea that’s caused by a virus. Diarrhea caused by a virus tends to clear up on its own with time. Your child's healthcare provider may want to run tests to ensure the diarrhea is due to something else, however.

In rare cases, diarrhea can be caused by bacteria or a parasite. If the provider suspects either of these, they will run a test on your child's stool, and then prescribe the appropriate medication if the test comes back positive.

If the healthcare provider suspects the diarrhea is triggered by a food allergy or intolerance, they may run some tests and/or recommend a course of action, which may include an elimination diet. This means no longer giving your little one the foods that caused the diarrhea for a period of time to see if that resolves the diarrhea.

Over-the-counter anti-diarrheal medicines are not recommended for children younger than 2 years old. These medicines can damage your baby’s intestines. Check with your child's healthcare provider before giving your little one any medication for diarrhea.

Treatment of Mild to Moderate Diarrhea

If your baby or toddler has diarrhea but no other symptoms (like vomiting, dehydration, and fever) and is behaving completely normally and eating normally, you may not have to seek treatment or make any adjustments to their diet.

Continue to feed your little one regularly—whether that's with solid food, breast milk, or formula—as the episode of diarrhea may clear up on its own. If anything, you may consider reducing portion sizes of solid food.

If your child is vomiting in addition to having diarrhea, you might consider giving a store-bought electrolyte solution in place of their normal diet, but check with their healthcare provider first. Ask any questions you may have, especially about dosage and when to give the solution.

Treatment of Severe Diarrhea

If your baby or toddler has watery stools every couple of hours or more, get in touch with their healthcare provider. They may advise you to stop giving your child any solid foods for 24 hours and to avoid sugary drinks, broths that are high in sodium, and even water.

Instead, the provider may recommend you give your child a store-bought electrolyte solution. These contain the necessary levels of minerals and salts to rehydrate your baby.

When to Seek Immediate Medical Attention for Treatment

It's a good idea to contact the healthcare provider whenever your child has diarrhea, even if it's mild. But in certain circumstances, it's especially important to notify the provider promptly or even immediately.

If you notice your child has any of the following types of diarrhea, notify your provider, as your child may need to be evaluated and tested as soon as possible:

  • Green or yellow loose stools, which indicate that the diarrhea is caused by a virus

  • Black or red loose stools, which contain blood. This may be due to bleeding in the intestines caused by injury or irritation

  • Any unusual color of loose stool not listed here.

It's worth noting that a newborn or an infant often has varying colors of poop, including a yellowy poop, and these are typically not signs of diarrhea. If you're ever unsure, check with your baby's healthcare provider.

Sometimes, your child may have additional symptoms. If this is this case, it may be a sign of a more serious medical condition that only your child's healthcare provider can diagnose. If you notice any of the following in your child along with diarrhea, notify the healthcare provider immediately:

  • A fever (100.4 degrees Fahrenheit or greater for infants under 3 months, or 102 degrees Fahrenheit or greater for babies who are older) that lasts for more than 24 hours

  • Vomiting that lasts for more than 12 hours

  • Vomit that looks green, bloody, or like coffee grounds

  • A distended (swollen) abdomen

  • Abdominal pain (for example, if it's sore to the touch)

  • Blood in the stools

  • Rash

  • Jaundice (yellow skin and eyes)

  • Your child refuses to eat or drink.

Keeping Your Child Hydrated

Rehydration is really important during a diarrhea spell to prevent your child from getting dehydrated. If your baby is younger than 6 months old, keep them hydrated with breast milk or formula as water is not recommended for babies in the first six months. For babies and toddlers over 6 months old, you can keep giving the same liquids you would normally, like water, breast milk, or formula.

Your baby or toddler's healthcare provider might recommend you use a store-bought electrolyte solution to help keep your little one properly hydrated and may offer specific instructions on how to do this. Here are some general guidelines on giving your child an electrolyte solution:

  • For breastfed babies, you can continue to nurse as usual, as well as giving the electrolyte solution, unless your provider recommends just breastfeeding.

  • For formula-fed babies, you should stop offering formula and give only the electrolyte solution until the diarrhea and/or vomiting has stopped. Then you can go back to formula-feeding.

  • For older babies and toddlers who are eating solid foods, reintroduce your child's normal diet only once the diarrhea and/or vomiting have stopped. Until then, give the electrolyte solution exclusively until the diarrhea has decreased. After 12 to 24 hours of giving the electrolyte solution, you can also offer certain bland and easily digestible foods including crackers, toast, rice, chicken, applesauce, pears, bananas, and gelatin.

If you are seeing signs of dehydration in your little one that include a decrease in wet diapers, no tears when crying, and sunken eyes and fontanelles, call the healthcare provider. This type of dehydration may be severe and may require hospitalization so that your child can be rehydrated with intravenous fluids.

Preventing Diarrhea

Diarrhea isn't something you can prevent outright, but there are ways to lessen the chances of your child getting diarrhea associated with viruses, bacteria, or food poisoning:

  • Make sure your child is up-to-date with the rotavirus vaccine, which can guard your little one against this specific virus

  • Frequently wash your baby's hands or use hand wipes when washing isn't an option. Viruses can be transferred from the hands to the mouth easily, which is especially true for babies and toddlers who are constantly putting their hands in their mouths.

  • Teach your older toddler or child to properly wash their hands after using the toilet and encourage them to observe good hygiene

  • Avoid giving your child unpasteurized (often labeled as raw) milk, which can contain bacteria, viruses, and parasites

  • Thoroughly wash all produce (carrot sticks, for example) before offering it to your toddler

  • Thoroughly clean all kitchen equipment and countertops after handling raw meat, especially poultry

  • Immediately refrigerate meats after bringing them home from the supermarket

  • Refrigerate all leftover foods right away to prevent contamination that can lead to food poisoning

  • Only give your child antibiotics if their healthcare provider has recommended it

  • Limit sugary drinks and fruit juices in your child's diet

  • Don't allow your child to drink from natural water sources like springs, streams, or lakes unless it's posted that the water is safe for drinking

  • Avoid washing pet food bowls or cages in the same sink that you wash your dishes, and ideally keep the pet-feeding area separate from where your family eats.

The Bottom Line

Although diarrhea is unpleasant for both your baby and for you during diaper changes, soon enough you'll be back to changing diapers with no unpleasant surprises, and your baby will be back to being content.

Would you like to get rewarded for all those diapers you're changing? You deserve it now more than ever! The Pampers Club app is just for you. Simply scan the products you buy to get rewards points you can redeem for great swag for you or your little one. How cool is that!

How We Wrote This Article The information in this article is based on the expert advice found in trusted medical and government sources, such as the American Academy of Pediatrics and the American College of Obstetricians and Gynecologists. You can find a full list of sources used for this article below. The content on this page should not replace professional medical advice. Always consult medical professionals for full diagnosis and treatment.

About Christopher B. Peltier

Dr. Chris Peltier is an expert in pediatrics and medical education, and currently practices as a general pediatrician at Pediatric Associates of Mount Carmel, Inc., where he’s served his community for over two decades. Dr. Peltier currently serves as...

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