What to Feed Baby After a Stomach Bug
Medically reviewed by Dr. Sarah Chen, MD, FAAP · Board-Certified Pediatrician
Content reviewed against published AAP, AAP, NIH guidelines
Last reviewed:
Digestive issues are common in infants and toddlers. If your baby is experiencing what to feed baby after a stomach bug, here is what you need to know.
The short answer
After a stomach bug, resume your baby's normal diet as tolerated rather than restricting to bland foods. Breast milk and formula are ideal for recovery. The old BRAT diet (bananas, rice, applesauce, toast) is no longer specifically recommended because it is too restrictive in nutrition. Offer whatever your baby will eat, in small frequent amounts, focusing on hydration first.
Key takeaways
- After a stomach bug, resume your baby's normal diet as tolerated rather than restricting to bland foods. Breast milk and formula are ideal for recovery. The old BRAT diet (bananas, rice, applesauce, toast) is no longer specifically recommended because it is too restrictive in nutrition. Offer whatever your baby will eat, in small frequent amounts, focusing on hydration first.
- Usually normal when: Decreased appetite for 2 to 5 days after a stomach bug that gradually improves
- Call your doctor if: Your baby cannot tolerate any oral intake and shows signs of dehydration
- Varies by age — see the age-by-age breakdown below
“The biggest concern with vomiting is dehydration. Young children can become dehydrated quickly, so it's important to replace fluids. Offer small amounts of an oral rehydration solution frequently.”
Parents everywhere have the same worry. You are doing the right thing by looking into it.
What Parents Should Know
According to AAP, NIH guidelines, after a stomach bug, resume your baby's normal diet as tolerated rather than restricting to bland foods. Breast milk and formula are ideal for recovery. The old BRAT diet (bananas, rice, applesauce, toast) is no longer specifically recommended because it is too restrictive in nutrition. Offer whatever your baby will eat, in small frequent amounts, focusing on hydration first. At 0-3 months, continue breastfeeding or formula feeding as the primary recovery diet. Breast milk is ideal because it contains immune factors that help fight the infection. If your baby is vomiting, offer smaller, more frequent feeds. Oral rehydration solution can supplement if dehydration is a concern, but should not replace milk feeds. It is generally considered normal when decreased appetite for 2 to 5 days after a stomach bug that gradually improves. However, you should contact your pediatrician promptly if your baby cannot tolerate any oral intake and shows signs of dehydration.
Normal vs. Concerning
By Age
What to expect by age
0-3 months
Continue breastfeeding or formula feeding as the primary recovery diet. Breast milk is ideal because it contains immune factors that help fight the infection. If your baby is vomiting, offer smaller, more frequent feeds. Oral rehydration solution can supplement if dehydration is a concern, but should not replace milk feeds.
3-6 months
Resume normal breast milk or formula as soon as vomiting subsides. There is no need to dilute formula during recovery. If your baby had just started solids, you can pause them temporarily until the acute illness resolves and then reintroduce. Focus on maintaining milk feeds for hydration and nutrition.
6-12 months
Once vomiting stops, offer breast milk or formula first, then reintroduce regular solid foods as tolerated. Starchy foods (bananas, rice cereal, potatoes), protein (chicken, yogurt), and easily digested fruits are good choices. Avoid high-sugar foods and juice. Small, frequent meals are better than large ones.
12-24 months
Offer whatever your toddler will eat from their normal diet. Good recovery foods include crackers, toast, rice, bananas, applesauce, chicken soup, and yogurt. Avoid fatty, fried, or heavily sweetened foods initially. Full appetite typically returns within 3 to 5 days of recovery. Temporary dairy avoidance may help if diarrhea persists.
What to Tell Your Pediatrician
- Describe when you first noticed what to feed baby after a stomach bug and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your baby refuses to eat for more than 3 days after vomiting has stopped.
- Mention if you are unsure how to safely reintroduce foods after a prolonged illness.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- Decreased appetite for 2 to 5 days after a stomach bug that gradually improves
- Preference for bland or simple foods during recovery
- Small amounts eaten at first, building back to normal portions over days
- Your baby refuses to eat for more than 3 days after vomiting has stopped
- You are unsure how to safely reintroduce foods after a prolonged illness
- Diarrhea persists more than a week after the illness despite dietary modifications
- Your baby cannot tolerate any oral intake and shows signs of dehydration
- Weight loss during or after the illness is significant
- Vomiting returns when food is reintroduced, especially if it is bilious
What You Can Do at Home
- Keep track of when you notice what to feed baby after a stomach bug — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that decreased appetite for 2 to 5 days after a stomach bug that gradually improves — this is generally within the range of normal.
- At 0-3 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Keep your baby upright for 20-30 minutes after feeding. Note any patterns between feeds and symptoms.
- While monitoring at home, seek immediate care if your baby cannot tolerate any oral intake and shows signs of dehydration.
Related Conditions
Stomach Bug Timeline in Baby
A typical stomach virus (gastroenteritis) in babies lasts 1 to 3 days for vomiting and 5 to 7 days for diarrhea, though some viruses can cause diarrhea lasting up to 2 weeks. The most important thing is to maintain hydration during this time. Your baby is usually most contagious in the first few days of symptoms.
Repeated Vomiting and Dehydration Risk in Baby
Repeated vomiting puts babies at risk of dehydration more quickly than older children because of their smaller fluid reserves. The key is offering small, frequent sips of fluid (breast milk, formula, or oral rehydration solution) rather than large feeds. Signs of dehydration include fewer wet diapers, dry mouth, sunken fontanelle, and lethargy.
Temporary Lactose Intolerance After Illness
Temporary (secondary) lactose intolerance can occur after a stomach virus because the infection damages the intestinal lining where lactase enzyme is produced. This typically causes watery diarrhea, gas, and bloating when consuming milk or lactose-containing formula. It usually resolves within 2 to 6 weeks as the gut heals. Most babies do not need to permanently avoid lactose.
Related Resources
Vomiting Decision Tree
Evaluate vomiting severity and decide when to call the doctor.
Poop Color & Texture Guide
What your baby's poop color and consistency mean, and when to worry.
Month-by-Month Development
Detailed monthly development guides from birth through 24 months.
When to Call the Doctor
General guide on when to call the pediatrician, visit urgent care, or go to the ER.
Frequently asked questions
Is what to feed baby after a stomach bug normal?
When should I call the doctor about what to feed baby after a stomach bug?
When is what to feed baby after a stomach bug normal?
What causes what to feed baby after a stomach bug?
What should I mention to my pediatrician about what to feed baby after a stomach bug?
Is what to feed baby after a stomach bug normal at 0-3 months?
Is what to feed baby after a stomach bug normal at 3-6 months?
Should I go to the ER for what to feed baby after a stomach bug?
Does what to feed baby after a stomach bug go away on its own?
References
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss What to Feed Baby After a Stomach Bug.
Things to mention
- Describe when you first noticed what to feed baby after a stomach bug and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your baby refuses to eat for more than 3 days after vomiting has stopped.
- Mention if you are unsure how to safely reintroduce foods after a prolonged illness.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- Your baby refuses to eat for more than 3 days after vomiting has stopped
- You are unsure how to safely reintroduce foods after a prolonged illness
- Diarrhea persists more than a week after the illness despite dietary modifications
Urgent signs to report immediately
- Your baby cannot tolerate any oral intake and shows signs of dehydration
- Weight loss during or after the illness is significant
- Vomiting returns when food is reintroduced, especially if it is bilious
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of what to feed baby after a stomach bug are normal. Talk to your pediatrician if your baby cannot tolerate any oral intake and shows signs of dehydration.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
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Related Digestive Concerns
Stomach Bug Timeline in Baby
A typical stomach virus (gastroenteritis) in babies lasts 1 to 3 days for vomiting and 5 to 7 days for diarrhea, though some viruses can cause diarrhea lasting up to 2 weeks. The most important thing is to maintain hydration during this time. Your baby is usually most contagious in the first few days of symptoms.
Repeated Vomiting and Dehydration Risk in Baby
Repeated vomiting puts babies at risk of dehydration more quickly than older children because of their smaller fluid reserves. The key is offering small, frequent sips of fluid (breast milk, formula, or oral rehydration solution) rather than large feeds. Signs of dehydration include fewer wet diapers, dry mouth, sunken fontanelle, and lethargy.
Temporary Lactose Intolerance After Illness
Temporary (secondary) lactose intolerance can occur after a stomach virus because the infection damages the intestinal lining where lactase enzyme is produced. This typically causes watery diarrhea, gas, and bloating when consuming milk or lactose-containing formula. It usually resolves within 2 to 6 weeks as the gut heals. Most babies do not need to permanently avoid lactose.
My Baby's Belly Looks Swollen
A rounded, slightly protruding belly is completely normal in babies and toddlers due to immature abdominal muscles and their proportionally larger organs. However, if the belly becomes suddenly swollen, feels hard and tight, or is accompanied by pain, vomiting, or changes in bowel movements, it needs medical evaluation as it could signal gas buildup, constipation, or rarely, something more serious.
My Baby Has an Anal Fissure (Blood When Pooping)
A small streak of bright red blood on the surface of your baby's stool or on the diaper is most commonly caused by an anal fissure, which is a tiny tear in the skin around the anus from passing hard stool. Anal fissures are very common in babies and toddlers and usually heal on their own with simple measures like keeping stools soft. While this is rarely serious, any blood in your baby's stool should be mentioned to your pediatrician.
Can Antibiotics Damage My Baby's Gut?
Antibiotics can temporarily disrupt your baby's gut microbiome, which may cause loose stools, fussiness, or diaper rash during and shortly after treatment. However, when antibiotics are medically necessary, the benefits of treating the infection far outweigh the temporary gut disruption. Most babies' microbiomes recover within weeks to months, especially with breastfeeding and a gradual return to normal feeding patterns.