Vomiting and diarrhea in children are most commonly caused by a stomach virus (viral gastroenteritis) and typically resolve without medical treatment — vomiting usually stops within 1–3 days, and diarrhea within 5–7 days. The most important concern is dehydration. Offer small, frequent sips of an oral electrolyte solution (like Pedialyte). Call your pediatrician if your child shows signs of dehydration, has blood in the stool or vomit, is under 3 months old with any vomiting, has a high fever, or symptoms worsen after 48 hours.
When a Stomach Bug Causes Child Vomiting and Diarrhea
One of the most feared illnesses to hit a household – gastroenteritis. It’s never fun to have a sick kid but this illness often takes down the whole family which makes it even more challenging. Dr. Tara Mamdouhi shares tips on how to get through the vomiting and diarrhea. Remember that we are a phone call away if you have more questions.
When a stomach bug hits your house, it can feel like everything comes to a screeching halt. Vomiting, diarrhea, low energy, lots of laundry — it’s definitely not fun! The good news is that most stomach bugs are caused by viruses and, while unpleasant, usually get better with time and supportive care.
Signs of Dehydration During Child Vomiting and Diarrhea
The number one goal is keeping your child hydrated. If your child is vomiting, think tiny sips, not big gulps. Offer small sips of an oral rehydration drink like Pedialyte, or even a spoonful every few minutes. Breastfeeding can continue as usual. Older kids may also do well with ice chips or popsicles. Try to avoid juice, soda, and sports drinks, since all that sugar can make diarrhea worse. Once the stomach starts to settle, you can slowly increase how much they drink.
A child with a stomach bug should still be urinating regularly, even if it is less than usual. As a general guide, babies should have at least 3 to 4 wet diapers in 24 hours, and older children should urinate at least every 6 to 8 hours. Dark yellow urine, dry lips, no tears when crying, sunken eyes, unusual sleepiness, dizziness, or a child who is too tired to drink are all warning signs that your child may be getting dehydrated and are definitely reasons to give us a call.
What Should a Child Eat After Vomiting and Diarrhea?
When the vomiting starts to settle, it is okay to offer simple foods if your child seems hungry. Crackers, toast, rice, applesauce, bananas, soup, noodles, and other easy foods are all fine. There is no need to worry if your child does not feel like eating much at first. Drinking is more important than eating in the early stages.
How Long Does Diarrhea Last?
Diarrhea can linger for a few days to about one week, though it should start to improve after a few days. Most children do not need medicine for it. In fact, over-the-counter anti-diarrhea medicines are usually not recommended for kids. Antibiotics also do not help most stomach bugs because viruses are usually the cause.
Here are some important things to look out for: if your child seems dehydrated, has a very dry mouth, is not peeing much, is hard to wake, has blood in vomit or stool, severe belly pain, a high fever, or symptoms that are not improving, please give us a call right away!
Recovery From Viral Gastroenteritis
Stomach bugs are exhausting, but most children bounce back beautifully with fluids, cuddles, and time. As always, if you are worried, we are here to help!
Child Vomiting and Diarrhea FAQ
How long does vomiting last in children with a stomach bug?
Vomiting from a stomach virus typically peaks in the first 24 hours and usually resolves within 1–3 days. Diarrhea often follows and can last 5–7 days. If vomiting is lasting more than 48 hours, is accompanied by severe abdominal pain, or there is blood in the vomit, call Spring Valley Pediatrics. Learn more about norovirus from the CDC.
What should my child eat and drink when vomiting and has diarrhea?
Hydration is the priority. For a child who is actively vomiting, start with very small amounts of clear liquid — 1–2 teaspoons every 5–10 minutes — and gradually increase as tolerated. An oral electrolyte solution (Pedialyte or similar) replaces sodium and potassium lost through vomiting and diarrhea better than water alone. Breastfed infants should continue breastfeeding. Additional stomach virus information from the American Academy of Pediatrics.
What are the signs of dehydration in a child?
Watch for: no urination for 6–8 hours (or no wet diaper for 6 hours in infants), very dark yellow urine, dry or sticky mouth, no tears when crying, sunken eyes, unusual drowsiness or irritability, and in infants, a sunken fontanelle (soft spot). Seek medical care promptly if you notice these signs.
When should I call the pediatrician about vomiting and diarrhea?
Call Spring Valley Pediatrics at 202-966-5000 if your child shows signs of dehydration, has blood in the stool or vomit, is under 3 months old with vomiting, has a fever above 104°F, has severe or worsening abdominal pain, cannot keep any liquids down after 4–6 hours of trying, or has symptoms not improving after 48–72 hours.
Should I give my child anti-diarrhea medication?
No. Over-the-counter anti-diarrhea medications are not recommended for children. Diarrhea is the body’s mechanism for expelling the virus — slowing it down can prolong illness or cause complications. Focus on hydration.
Is the BRAT diet still recommended for kids with stomach bugs?
The BRAT diet is no longer specifically recommended. Current AAP guidance supports returning to a normal age-appropriate diet as soon as your child can tolerate eating — typically within 24 hours after vomiting stops. Bland foods are a natural good choice, but strict BRAT limits nutrients during recovery.
When can my child return to school after a stomach bug?
Most schools and daycares require children to be free from vomiting and diarrhea for 24 hours before returning.
How do I prevent the stomach bug from spreading at home?
Thorough handwashing with soap and water after handling soiled laundry and before preparing food is the most important prevention. Disinfect frequently touched surfaces with a bleach-based cleaner. Hand sanitizer is less effective against norovirus — soap and water is preferred.
