How to Get Phlegm Out of Baby's Throat Safely

When your baby is not comfortable while feeding or lying down and you hear a gurgle it can be really scary. In most cases, it is not a thick phlegm in the lungs that is causing the sound.

Instead, it's the mucus discharge from the nose that enters the back of the throat. This happens a lot because babies are not yet able to cough and get rid of the mucus effectively. Using saline drops, gentle nasal suctioning and ensuring that the baby is hydrated properly, will help with most cases.

This guide will teach you how get phlegm out of baby's throat safely, signs of emergency and when to call your pediatrician.

Table of Contents

Is it Throat Phlegm or Nasal Mucus?

Parents may hear the sound of "phlegm" in their baby's throat. This is usually due to a build-up of nasal mucus that drips down the throat. Babies breathe primarily through their nose until they are 6 months old and a small blockage can feel like much more than it is.

Diseases such as bronchiolitis or pneumonia make it more likely that phlegm from the airways or lungs will be caused. According to Mayo Clinic Bronchiolitis Guide, babies with airway mucus can have a long cough, fast breathing and may wheeze. Infants are not able to clear their throat on purpose like older children. Instead they inhale the mucus which in most instances is harmless.

Signs for Age: Newborns and Older Infants

In the first year, how mucus is managed is quite different due to the increasing size of the airways and strengthening of immune system with the passage of time.

Age in months	Common Signs	Recommendation
0--2	Noisy breathing feeding difficulty frequent swallowing of mucus	Contact a healthcare provider quickly if feeding goes down breathing changes or fever appears.
3--6	Cough. Still significant nasal congestion	Use saline drops and gentle nasal suction before eating or sleeping.
6--12	Stronger cough and more contact with viruses	Continue care while watching breathing and hydration.

Newborns (0 to 2 Months)

A newborn breathes by nose. Breastfeeding and/or bottle-feeding may be more challenging with congestion, as they may not be able to breathe and swallow through the mouth.

Children under 3 months with a temperature of 100.4°F (38°C) or higher is considered as an emergency because they may get very sick quickly (National Institute for Health and Care Excellence [NICE] 2024).

Babies (3 to 6 Months)

At this stage, babies may cough more effectively, but still require assistance from their caregivers to cough up nasal mucus. If there is a significant amount of congestion when feeding and sleeping, saline drops and gentle suction are helpful (Nationwide Children's Hospital, 2026).

Babies (6 to 12 Months)

Older babies will be likely to cough and not have difficulty with the mucus. They are also at a higher risk of picking up viruses from siblings, day care or other people that can cause colds.

Younger babies require quicker medical attention

Babies younger than 3 months old have not fully developed immune systems and have narrow air passages. Any swelling or mucus may have a significant impact on breathing and feeding. When symptoms of the respiratory system are present, it is generally recommended that health care providers evaluate young babies prior to older babies.

Is it mucus, Phlegm or a Choking Emergency?

While most sounds of mucus are not a matter of concern, parents should be able to recognize when it is an actual airway emergency.

A healthy infant who has normal mucus in the back of his/her throat can:

• Swallow frequently

• Occasionally rattle or gurgle

• Cough for a few minutes and then lie down

• Breathe easily when eating or drinking

Such situations can easily be managed by flushing the nose with saline and suctioning (AAP, 2024).

Gagging vs. Choking

The gag reflex is a protective mechanism to help remove material from the airway. It is generally noisy, as air keeps flowing through the throat.

Choking is different. If the baby is choking, he or she may not be able to cry, cough, or make sounds due to the blockage of the airway.

If choking occurs, the American Red Cross recommends to seek immediate emergency assistance and begin age-appropriate first aid.

Wheezing, Stridor or Noisy breathing

The different breathing sounds can be indicators of different issues:

Wheezing is a high pitched whistling noise during breathing out, and is usually associated with the lower airways.

Stridor is a loud sound on inspiration, which means that the upper airway is narrowing.

If wheezing or stridor continues, it is always important to have a healthcare provider evaluate the child as it may indicate bronchiolitis, croup or other airway problems.

Blue lips, Pale skin or Difficulty breathing

If your baby develops any of the following, please dial the emergency medical services immediately:

• Blue or gray lips

• Pale skin

• Chest retractions that are severe.

• Long apneas

• Difficulty waking

• Failure to feed due to breathing problem.

When to go to the ER

Go to the nearest emergency department immediately if your baby:

• Choking

• Does not have blue lips or face

• Breathes very quickly and with deep chest retractions

• Is extremely sleepy

• Has intermittent periods of not breathing

• Is severely dehydrated
  

  

Common Cause of Phlegm in the Baby Throat

A short-term viral illness, or drainage of mucus from the nose, causes babies to have excess mucus in their throat. It is important for parents to know the cause, so they can choose the most appropriate treatment, and understand when to seek medical help.

Common Cold, Postnasal Drip, Reflux, Dry Air, Respiratory Infections

The common cold is the most common reason for build-up of mucus in the throat of babies. Babies make rattling or gurgling sounds when they have a blocked nose due to postnasal drip. Saline flushing and gentle suction of the nose will often help in such scenarios.

Some babies also have mucus in their throat because of gastroesophageal reflux (GER), which is the temporary build-up of milk and saliva in the throat after being fed. More severe viral infections can also increase the congestion, e.g., respiratory syncytial virus (RSV), influenza and COVID-19 may cause fever, wheezing, rapid breathing or difficulty latching on to the breast, particularly in infants less than 1 year of age.

Safe Step-by-Step Suctioning for Babies

Apply 2-3 drops of sterile saline into each nostril before removing the mucous plug and allow to soften in place for 30-60 seconds. This will make it easier to suction and help to avoid irritation of the nasal lining (Nationwide Children's Hospital, 2026).

Both bulb syringing and electric nasal aspirators work well to remove mucus, but electric nasal aspirators may be more effective and less labor intensive.

Feature	Bulb Syringe	Electric Nasal Aspirator
Suction	Manual	Gentle
Ease of use	Requires squeezing	One-button operation
Cleaning	Adequate	Washable parts on most models
Best for	Rare congestion	Frequent congestion
Key benefit	Low cost	Quicker mucus removal

Only do suctioning when the congestion is causing discomfort to feeding, sleeping or breathing. Too much suctioning can irritate the sensitive nasal passages.

What to Do If Suctioning Does Not Work

The three steps that must be repeated are: Repeat Saline, Adjust Position and Watch Feeding.

If the mucus is still thick, repeat the saline and suction again after 1 minute. Holding your baby upright can help the mucus drain away. Back patting may be comforting and may help to induce coughing, but do not forcefully pat the chest unless directed by health care provider.

Look for symptoms like fewer wet diapers, breathing problems, difficulty to feed. Seek advice from your pediatrician immediately if you see any of these signs a they indicate that your baby is dehydrated or there is something more serious.

Saline Drops, Sprays and Safe Dosing by Age

Saline drops are usually recommended for newborns because they can be applied gently into the little nostrils, while saline sprays can be used for older infants who are more tolerant (Nationwide Children's Hospital, 2026).

Wait 30 to 60 seconds after applying saline before suctioning. Saline does not contain any medicine so it can be used several times during the day.

Humidifiers, Steam and Room Environment

A cool-mist humidifier is recommended over warm-mist humidifiers. It should be cleaned regularly to avoid bacteria and mold.

Dry winter air, tobacco smoke, vaping, dust strong fragrances and viruses in daycare can all worsen congestion.

Feeding and Positioning to Help Clear Throat Mucus

Feeding in proper position, small and frequent feeds and increased burping can help the baby to breathe better during the feed and reduce swallowed air and spit-up.

If your baby is awake hold him or her upright for 20 to 30 minutes after feeding to help clear up the mucus in the throat that can cause reflux. Always put babies to sleep on their back.

Gentle Chest and Back Techniques

Holding your baby upright and giving gentle pats on the back may help him or her cough or swallow when the mucus has loosened. Do not use chest percussion or shaking or home drainage unless directed by a health care provider as these are not recommended for normal congestion.

If chest congestion is also accompanied by wheezing, rapid breathing, chest retractions or persistent fever get professional advice as this could be related to bronchiolitis or pneumonia or other lower respiratory infection.

Antibiotics and What to Avoid

Antibiotics will not help with viruses such as a Respiratory Syncytial Virus (RSV); they work for bacteria only.

Do not administer fever reducing medicine without consulting your health care provider. Be aware of symptoms of infection and when to seek advice.

Infection Signs and When to Seek Medical Advice

If your baby is more than 3 months old and has a temperature of 100.4°F (38°C) or higher seek medical attention right away.

If your baby has breathing issues, chest retractions, nasal flaring, poor feeding, fewer wet diapers, persistent vomiting, weight loss or symptoms that last longer than 10 to 14 days contact your healthcare provider.

How to Prevent Baby's Throat from Getting Mucus

Wash bottles, pacifiers and toys regularly. Ensure baby's environment is free from smoke and aerosol sprays that may irritate the airway. Caregivers need to be updated about vaccines of influenza, COVID-19 and pertussis. Breastfeeding also provides antibodies and immune factors which support the development of infant's immune system (WHO, 2023).

Conclusion

Using saline nasal irrigation, nasal suctioning, feeding positions and a healthy room environment are methods to treat your baby's throat phlegm at home. You must seek pediatrician's advice before using any medicine. Keep in mind that taking over-the-counter cough medicine can be more harmful than helpful. Always seek professional help when required.

Reference List

American Academy of Pediatrics. HealthyChildren.org. https://www.healthychildren.org/English/health-issues/conditions/chest-lungs/Pages/caring-for-kids-with-colds-and-flu-simple-remedies-that-help.aspx

American Red Cross. Infant Choking: How to Help.https://www.redcross.org/take-a-class/resources/learn-first-aid/infant-choking?srsltid=AfmBOopC3I-RQIKdM8S1up1xnv9tehwvdnKOlBqTmcJOuHIO0932GInL

Mayo Clinic Bronchiolitis Guide. https://www.mayoclinic.org/diseases-conditions/bronchiolitis/symptoms-causes/syc-20351565

National Institute for Health and Care Excellence (NICE). Fever in Under 5s: Assessment and Initial Management. https://www.ncbi.nlm.nih.gov/books/NBK552086/

Nationwide Children's Hospital.What Kind of Stuff Clears up a Stuffy Nose? https://www.nationwidechildrens.org/family-resources-education/700childrens/2015/12/what-kind-of-stuff-clears-up-a-stuffy-nose

World Health Organization. Infant and Young Child Feeding. https://www.who.int/news-room/fact-sheets/detail/infant-and-young-child-feeding