Vomiting in Infants
When a baby forcefully brings up stomach contents
Quick Facts
- Type: Infant digestive symptom
- Common causes: Stomach bugs, overfeeding, reflux, infection
- Key risk: Dehydration
- Seek urgent care: Green or bloody vomit, dehydration, lethargy
Overview
Vomiting in infants is the forceful emptying of stomach contents through the mouth. It is important to tell it apart from spitting up (gentle reflux), which is very common, effortless, and usually harmless in healthy babies who are feeding and growing well. True vomiting is more forceful and may come with other signs of illness.
Most infant vomiting is caused by minor, self-limiting problems such as a stomach virus or feeding too much, and it settles within a day or two. However, because babies are small, they can become dehydrated quickly, and certain patterns of vomiting can signal a more serious problem that needs prompt care. Knowing how to keep a baby hydrated and recognizing the warning signs are the most important things for parents. Keeping a close eye on how much your baby is drinking and how many wet diapers they produce is the best way to catch early dehydration, which is the main risk when a small baby is vomiting, and it guides when to seek help.
Common Causes
Vomiting in babies has many possible causes:
- Viral gastroenteritis: A stomach bug (gastroenteritis) is the most common cause, often with diarrhea.
- Overfeeding or feeding issues: Taking in too much milk or swallowing air can trigger vomiting.
- Reflux: Reflux usually causes gentle spitting up but can occasionally be more forceful.
- Infections elsewhere: Ear infections, urinary infections, or colds can cause vomiting.
- Food intolerance or allergy: Such as milk allergy.
- Pyloric stenosis: In young infants, forceful, projectile vomiting after feeds can signal pyloric stenosis, which needs medical care.
Associated Symptoms
The symptoms that accompany vomiting help judge how serious it is:
- Diarrhea, fever, or fussiness from infection
- Spitting up or regurgitation between feeds
- Refusing feeds or loss of appetite
- Fewer wet diapers, a dry mouth, or no tears when crying (signs of dehydration)
- Being unusually sleepy, floppy, or hard to wake
Green (bile-stained) or bloody vomit, a swollen or hard belly, or projectile vomiting in a young baby are warning signs that need prompt medical attention.
Diagnosis & Evaluation
A doctor evaluates infant vomiting based on the pattern and the baby's overall state:
- History: When the vomiting started, how forceful it is, its color, feeding details, and other symptoms.
- Exam: Checking hydration, the belly, weight, and signs of infection.
- Tests when needed: Urine tests for infection, blood tests, or an abdominal ultrasound if a blockage or pyloric stenosis is suspected.
Many cases need no tests at all if the baby is feeding, hydrated, and otherwise well.
Treatment & Management
Care focuses on preventing dehydration and treating the cause:
- Keep feeding in small amounts: For breastfed babies, continue nursing in shorter, more frequent sessions; for formula-fed babies, offer small, frequent amounts.
- Oral rehydration: Your pediatrician may recommend an oral rehydration solution for babies losing fluids; avoid plain water or sugary drinks unless advised.
- Treat the underlying cause: Such as an ear or urinary infection.
- Avoid anti-vomiting medicines unless prescribed by a doctor for infants.
Most viral vomiting settles within 24 to 48 hours. Watch closely for dehydration throughout.
Self-Care & Prevention
Some causes of infant vomiting can be reduced with simple measures:
- Prevent infections with careful hand washing and recommended vaccines, including rotavirus.
- Feed appropriately, avoiding overfeeding and burping your baby during and after feeds.
- Keep baby upright for a short while after feeding to ease reflux.
- Clean bottles and feeding equipment thoroughly.
- Keep sick contacts away from young infants when possible.
Throughout any illness, the most important thing is to keep your baby hydrated and watch closely for warning signs of dehydration.
When to See a Doctor
Seek emergency or urgent care for an infant who has:
- Green (bile-colored) or bloody vomit, or vomit that looks like coffee grounds
- Forceful, projectile vomiting after feeds in a young baby
- Signs of dehydration: far fewer wet diapers, dry mouth, no tears, a sunken soft spot, or sunken eyes
- Being very sleepy, floppy, or hard to wake
- A swollen, hard, or very tender belly
- Any fever in a baby under 3 months, or vomiting that lasts more than a day
Green or bloody vomit and signs of significant dehydration are emergencies that require immediate medical care.
Frequently Asked Questions
What is the difference between vomiting and spitting up in babies?
Spitting up is the gentle, effortless return of small amounts of milk and is normal in healthy, growing babies. Vomiting is more forceful, brings up more stomach contents, and often comes with other signs of illness such as fever or diarrhea.
How do I keep my vomiting baby hydrated?
Continue breastfeeding in shorter, more frequent sessions, or offer small, frequent amounts of formula. Your pediatrician may recommend an oral rehydration solution. Watch for fewer wet diapers, a dry mouth, and no tears, which are signs of dehydration.
When is infant vomiting an emergency?
Seek emergency care for green or bloody vomit, forceful projectile vomiting in a young baby, signs of dehydration, a swollen or hard belly, unusual sleepiness or floppiness, or any fever in a baby under 3 months.
What does projectile vomiting in a baby mean?
Forceful, projectile vomiting right after feeds in a young infant can be a sign of pyloric stenosis, a narrowing at the stomach outlet that needs medical treatment. Any projectile vomiting in a baby should be evaluated by a doctor promptly.
How long does a baby's stomach bug last?
Vomiting from a viral stomach bug usually settles within 24 to 48 hours, often followed by a few days of diarrhea. If vomiting lasts longer than a day, your baby cannot keep fluids down, or signs of dehydration appear, contact your pediatrician.
References
- American Academy of Pediatrics. Vomiting in infants and children.
- Centers for Disease Control and Prevention (CDC). Rotavirus and gastroenteritis.
- MedlinePlus, U.S. National Library of Medicine. Vomiting.
- World Health Organization (WHO). Oral rehydration.