Silent Reflux in Babies

Silent reflux is not a formally recognised term in the medical literature, but it is commonly used among parents visiting our Allergy clinic. The term Gastro-oesophageal Reflux/Disease is more widely used, but regardless, parents use these terms to describe ‘silent, i.e. without visible regurgitation, symptoms that may include:

• Feeding refusal

• Irritability (especially during or after feeds)

• Back arching / Leg drawing (flexion)

• Choking, gagging, or coughing and may smell of sick / vomit when this happens

• Gurgling and swallowing of sick

• Unexplained or inconsolable crying (with painful tears)

Severe Findings

While less common, some infants may also experience:

• Food/feeding refusal

• Hoarseness or a chronic cough

• Respiratory symptoms such as wheezing or recurrent pneumonia

• Growth faltering or "failure to thrive" (in more severe cases)

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What Is Silent Reflux?

CMPA baby symptoms

Frequently Asked Questions

• What are the main symptoms of Silent Reflux

  • Feeding refusal (reflux can be very painful, and its a central deep pain)

  • Irritability (especially during or after feeds)

  • Back arching

  • Choking, gagging, or coughing and may smell of sick when this happens

  • Unexplained or inconsolable crying (with painful tears)

  Severe Findings

  While less common, some infants may also experience:

  • Food/feeding refusal

  • Hoarseness or a chronic cough

  • Respiratory symptoms such as wheezing or recurrent pneumonia

  • Growth faltering or "failure to thrive" (in more severe cases)

• Conservative management of Silent RefluxReflux

  • The first-line therapy is parental reassurance and conservative measures. These symptoms nearly always settle as your baby grows and the lower oesophageal sphinctor strengthens

  Trial feeding modifications

  1. smaller, more frequent feeds

  2. In formula-fed infants, thickened feeds., but these can constipate

  3. Extensively hydrolysed Rice or milk-based amino acid-based formulas may be considered for infants with suspected cow’s milk protein allergy. Hydrolysed rice milk formula is thought to be more palitable.

  4. Maternal elimination of dairy may be trialled in breastfed infants. The major Allergy Societities discourage this but many parents have already trialled dietary eliminations before attending clinic. In our expeience, some babies will be more comfortable with maternal dietary modification, but this needs to be monitored by a Dietitian. We discourage multiple allergen avoidance in moms diet, this seldom ever helps.

  5. NB! Positional therapy is not recommended due to safe sleep guidelines which encourages sleeping on the back.

  6. However, if your baby has productive reflux, and especially of they are tightly swaddled, it can be difficult for them to deal with any reflux which willl have to be swallowed. The stomach anatomy allows for easier reflux into the oesophagus when laying on the RHS, so keep this in mind when posistioning your baby

• Antacid medications for Silent Reflux

  • Pharmacological treatment (H2 blockers or PPIs) is reserved for infants with confirmed GORD who do not respond to conservative measures and have significant symptoms or complications.

  • Acid suppression does not stop the mechanical propcess of vomiting, but will reduce pain and acid irritation (which itself may calm the mucosa and nerves down in an irritated lower oesophagus).

  • Acid suppression should be used for the shortest duration possible (typically 4–8 weeks)

  • If Acid supression hads not unequivocally helped after at least 3-4 days, then there may be little point in continuing, but discuss with your Doctor. A positive response is normally very obvious to all, especially tired parents.

  • Acid suppression is not adequate for non-acid reflux and carries risks, including infection and altered microbiome with possioble links to subsequent allergy development.

• More Worrisome Symptoms: When to Seek Urgent Help

  The following "alarm symptoms" are not typical of silent reflux and warrant urgent evaluation for alternative diagnoses:

  • Bilious (green) vomiting

  • Hematemesis (blood in vomit)

  • Persistent, forceful vomiting

  • Important: Growth faltering should always prompt further evaluation for underlying pathology.

Worried About Allergies? Let’s Help You Get Answers

If your child is showing signs of a food, pollen, or skin allergy, early diagnosis is key. At London Allergy Consultants, our expert team provides trusted, evidence-based care tailored to your child’s needs. From testing to treatment plans, we guide you every step of the way.

London Allergy Consultants

London Allergy Consultants is a leading UK centre for diagnosing and treating food and airborne allergies in children and young people.

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