Baby Reflux vs. Colic: How to Tell the Difference and What Helps

Few things cause more confusion — and more late-night internet searches — for new parents than trying to understand whether their unsettled, crying baby has reflux, colic, or something else entirely. Understanding the difference between baby reflux and colic is genuinely useful because the two conditions, while they can overlap, have different causes, different presentations, and different management approaches. Getting the distinction right means you can focus your energy on strategies that actually help rather than cycling through every remedy on the market. In this article, we define both conditions clearly, outline the key differences, review what NICE guidelines say about managing infant reflux, and provide practical, evidence-based advice on what actually helps each condition.

What Is Baby Reflux?

Gastro-oesophageal reflux (GOR) is the involuntary passage of stomach contents back up into the oesophagus — and in many babies, all the way into the mouth. It occurs because the lower oesophageal sphincter (the valve between the oesophagus and stomach) is immature and does not yet close reliably after feeds.

GOR is extremely common — studies suggest up to 50% of infants under three months bring up milk after feeds. In most babies, this is a nuisance rather than a medical problem: the baby is not distressed, is feeding well, and is gaining weight normally. This is sometimes called “happy spitter” reflux.

Gastro-oesophageal reflux disease (GORD) is the term used when reflux causes significant problems: distress, feeding difficulties, poor weight gain, or oesophageal irritation. GORD affects a smaller proportion of infants — estimates range from around 1–7% — and is the condition that may warrant medical treatment.

Signs of reflux include:

• Frequent spitting up or vomiting after feeds
• Arching of the back during or after feeding (appears to be in pain)
• Feeding reluctance — the baby associates feeding with discomfort
• Discomfort that is clearly worse after feeds and in horizontal positions
• Unexplained irritability, particularly post-feed
• Poor weight gain (in GORD, where reflux is significant enough to cause caloric loss)

What Is Colic?

Colic is defined by the traditional Wessel criteria as crying for more than three hours per day, more than three days per week, in an otherwise healthy baby. It affects an estimated 10–40% of infants, typically beginning in the second to third week of life, peaking at around four to six weeks, and resolving — sometimes quite suddenly — by three to four months.

The cause of colic is genuinely not well understood. Proposed mechanisms include gut microbiome immaturity, intestinal gas and motility patterns, sensitivity to proteins in breast milk or formula (cow’s milk protein allergy/intolerance, or CMPA), the normal Period of PURPLE Crying (a developmental crying phase), and maternal anxiety transfer. In practice, it is likely a heterogeneous condition with multiple contributing factors in different babies.

Key signs of colic include:

• Intense, inconsolable crying that is clustered in the evenings
• A predictable daily pattern — not all day, but reliably in the late afternoon and evening
• Visible signs of distress — clenched fists, drawn-up knees, red face
• Normal feeding (usually) — unlike reflux, feeding is not typically the trigger
• Normal weight gain
• Absence of significant vomiting or spitting up

The Key Differences Between Reflux and Colic

While reflux and colic can coexist, the key distinctions that help in practice are:

• Relationship to feeding: Reflux symptoms are directly linked to feeding — distress occurs during or shortly after feeds and typically improves when the baby is upright. Colic crying tends to be less directly related to feeding.
• Vomiting: Visible spitting up or vomiting is characteristic of reflux. Colic does not typically involve significant vomiting.
• Time of day: Colic crying is typically worst in the evenings. Reflux discomfort can occur at any feeding time throughout the day.
• Response to positioning: Reflux symptoms often improve with upright positioning. Colic may not respond to positional changes.
• Weight gain: Babies with colic almost always gain weight normally. Babies with significant GORD may have compromised weight gain due to caloric loss from vomiting.

NICE Guidelines on Infant Reflux: What the Guidance Says

NICE published guidance on gastro-oesophageal reflux in children and young people (NG1, updated 2019) that has significantly changed how infant reflux is managed in the UK. The key points for parents to understand:

• PPIs (proton pump inhibitors) are not recommended for GOR without GORD: Despite being widely prescribed, medications like omeprazole and lansoprazole have not been shown to reduce crying or irritability in infants with reflux. NICE guidance explicitly states that these drugs should not be used routinely in infants with regurgitation and crying who are otherwise thriving.
• Thickened formula may help: For formula-fed babies, anti-reflux (AR) or thickened formula can reduce the volume of visible vomiting. This does not necessarily address discomfort.
• A trial of extensively hydrolysed formula (or maternal dairy exclusion if breastfeeding) is recommended if cow’s milk protein allergy or intolerance is suspected, as CMPA can mimic or worsen reflux symptoms.
• Alginate preparations (such as Infant Gaviscon) may be tried for formula-fed babies. Evidence for breastfed babies is less consistent, and Gaviscon can cause constipation.

What Helps: Practical Approaches

For both conditions, the practical interventions with the best evidence base include:

• Feeding position: For reflux, an upright or semi-reclined feeding position and keeping the baby upright for 20–30 minutes after feeds can significantly reduce discomfort. Avoid car seats and bouncers for post-feed positioning as these increase intra-abdominal pressure.
• Smaller, more frequent feeds: Smaller volume feeds reduce gastric distension and may reduce reflux frequency. For breastfed babies, this means feeding more often rather than restricting feeds.
• Effective winding: Whether the issue is reflux or colic, thorough winding during and after feeds can reduce trapped wind and abdominal discomfort. Experiment with sitting upright winding, over-the-shoulder winding, and face-down across the knees.
• Warm bath or tummy massage: Gentle clockwise abdominal massage and warm baths can provide comfort during colic episodes. The “tiger in a tree” hold — baby face-down along your forearm — provides gentle tummy pressure that many parents find helpful.
• Probiotics: For breastfed babies, Lactobacillus reuteri (specifically studied brands) has some evidence supporting a modest reduction in colic crying. The evidence base is not yet strong enough for NICE to make a formal recommendation, but it is safe and may be worth trying.

Frequently Asked Questions

How do I know if my baby has CMPA rather than reflux or colic?

Cow’s milk protein allergy or intolerance (CMPA) can present similarly to both reflux and colic. Additional features that suggest CMPA include: eczema, blood in stools, significant mucus in stools, a family history of atopy, and symptoms that respond to dairy elimination. Discuss CMPA with your GP if you suspect it — a supervised elimination diet is the diagnostic approach.

Should I use Infant Gaviscon for reflux?

Infant Gaviscon may help reduce visible vomiting in formula-fed babies. It must be used according to instructions, as it can cause constipation. Discuss with your GP or health visitor before starting, particularly for breastfed babies, as it can interfere with the feed.

When does colic stop?

Most colic resolves by three to four months of age, often quite suddenly. The resolution is not gradual in many cases — parents frequently report that the baby “just stopped” one week. If intense crying continues beyond four months, discuss it with your GP.

Can I give my baby gripe water for colic?

Gripe water and similar herbal preparations have not been shown to be effective for colic in clinical trials. The NHS does not recommend them. Some preparations contain alcohol or herbs with unproven safety profiles in infants. Discuss with your pharmacist or GP if you are considering them.

Conclusion

Baby reflux and colic are both distressing, but they are different conditions requiring different approaches. The most important takeaway from NICE guidance is that proton pump inhibitors are not a first-line treatment for reflux in otherwise thriving infants — simple positional and feeding adjustments should come first. Your next step: discuss your baby’s specific symptom pattern with your GP or health visitor, who can help assess whether CMPA needs ruling out and whether any medical treatment is genuinely indicated. If you need additional support, the charity Infant GORD UK at infantgord.com offers UK-specific resources and a parent support community.