Baby Reflux / GERD
The short answer
Gastroesophageal reflux is very common in babies because the valve at the top of the stomach is still maturing. Most infant reflux is uncomplicated, meaning your baby spits up but is otherwise happy and growing well. True GERD, where reflux causes pain, feeding difficulties, or poor weight gain, affects a smaller number of babies and is very treatable.
Parents everywhere have the same worry. You are doing the right thing by looking into it.
By Age
What to expect by age
0-3 months
Reflux typically begins in the first few weeks of life as feeding volumes increase. Newborns have short esophaguses and immature digestive systems, making reflux almost universal to some degree. Keeping your baby upright after feeds, offering smaller more frequent feeds, and gentle burping can significantly help. Silent reflux, where the stomach contents come up but are swallowed back down causing discomfort without visible spit-up, can be harder to spot.
3-6 months
Reflux often peaks around 4 months and may seem to worsen before it gets better. If your baby is consistently uncomfortable during or after feeds, arches their back, or has feeding aversions developing, talk to your pediatrician. Positional strategies and sometimes thickening feeds can help. Most pediatricians prefer to try lifestyle changes before medication.
6-9 months
As babies learn to sit upright and begin eating solid foods, reflux often starts to improve naturally. Gravity and thicker food consistency both help keep stomach contents down. If reflux is worsening rather than improving after 6 months, your pediatrician may want to investigate further.
9-18 months
The vast majority of babies outgrow reflux by 12 to 18 months as the esophageal sphincter matures. If your baby was on reflux medication, your doctor will likely try weaning off it around this time. Persistent severe reflux beyond 18 months may warrant referral to a pediatric gastroenterologist.
What Should You Do?
When to take action
- Your baby spits up but is gaining weight well and seems happy between feeds
- Reflux episodes happen after feeds and your baby settles within a few minutes
- Your baby has brief episodes of arching or fussiness after large feeds but is otherwise content
- Symptoms gradually improve after 4 to 6 months of age
- Your baby consistently cries or arches during or right after feeds, suggesting pain rather than simple spit-up
- Your baby is developing feeding aversion, turning away from the bottle or breast before finishing
- Your baby has persistent coughing, wheezing, or hoarse voice that may be related to reflux
- Weight gain is slower than expected despite adequate feeding opportunities
- Your baby is refusing to eat entirely and showing signs of dehydration such as fewer wet diapers or sunken fontanelle
- Vomit is green or bile-stained, which could indicate an intestinal obstruction
- There is blood in spit-up or vomit, or your baby is having difficulty breathing during reflux episodes
Sources
Related Resources
Trust your instincts. If something feels wrong, reach out to your pediatrician.
Worrying about your baby means you care. That is a good thing.
Related Feeding Concerns
Baby Spitting Up Frequently
Spitting up is extremely common in healthy babies and is rarely a sign of anything serious. About half of all babies spit up regularly in the first few months, peaking around 4 months and typically resolving by 12 months. If your baby is gaining weight well, seems comfortable, and is a "happy spitter," the spit-up is usually more of a laundry problem than a medical one.
Spit-Up vs. Vomit: How to Tell the Difference
Spit-up flows or dribbles out effortlessly, happens shortly after feeding, and baby seems unbothered. Vomiting is forceful, involves stomach muscle contractions, may happen anytime, and often leaves baby uncomfortable or upset. Most babies spit up frequently in the first year - it's messy but harmless as long as baby is gaining weight and seems comfortable.
My Baby Arches Their Back
Back arching is very common in babies and usually a normal way of expressing frustration, discomfort, or just stretching and moving. Most babies arch their backs when upset, tired, or trying to see something. However, persistent arching with crying, especially during feeding, can be a sign of reflux or discomfort that should be discussed with your pediatrician.
Baby Arching Back and Crying During Feeding
A baby who arches their back and cries during feeding is often showing signs of discomfort. The most common cause is gastroesophageal reflux (GER) - stomach acid flowing back into the esophagus causes a burning sensation, and the baby arches to try to relieve it. Other causes include an improper latch (breastfeeding), a bottle nipple with too fast or too slow a flow, ear infection pain worsened by swallowing, oral thrush, or being overstimulated. If this is happening regularly, discuss it with your pediatrician.
My Baby Has a Feeding Aversion
Feeding aversion occurs when a baby develops anxiety or fear around feeding, often following a negative experience like choking, reflux pain, or pressure to eat. Unlike normal pickiness, babies with feeding aversion may cry, turn away, or arch their back at the sight of a bottle or food. The key to resolving feeding aversion is to remove all pressure, follow your baby's cues, and rebuild positive associations with feeding. This often requires patience and sometimes professional support.
Baby Refusing Bottle
Bottle refusal is a very common challenge, especially in breastfed babies who are accustomed to nursing. It does not mean something is wrong with your baby or your milk. Many babies need time, patience, and sometimes a different bottle or nipple to accept a bottle. Most babies will eventually take a bottle, especially when offered by someone other than the breastfeeding parent.