19 August 2026 · Little Rei
The Purpose of the Bulb Syringe for Infants
The bulb syringe is one of those objects that arrives with a baby, gets used badly or not at all, and turns out to matter. Its purpose is narrow and genuinely useful: babies breathe through their noses, and a blocked nose in a baby who cannot blow it interferes with the two things they most need to do, which are feeding and sleeping.
Why a blocked nose matters more in a baby
Young infants are close to obligate nose-breathers. An adult with a blocked nose is uncomfortable; a small baby with a blocked nose struggles to feed, because feeding requires sealing the mouth around a breast or teat and breathing through the nose at the same time. That is why a cold in a newborn shows up as poor feeding before it shows up as anything else.
What it is for, and what it is not
- For: clearing mucus before a feed, so the baby can actually feed.
- For: clearing enough to settle before sleep.
- For: a stuffy newborn in the first weeks, when noisy breathing is common and often just narrow passages.
- Not for: routine daily use. Over-suctioning irritates and swells the lining, which makes the blockage worse.
- Not for: ears. Never put a bulb syringe in an ear.
- Not a treatment for a chest infection. It clears the nose, nothing deeper.
How to use one properly
- Time it before a feed or before sleep, not after. Suctioning a full baby often brings the feed back up.
- Two or three saline drops in each nostril first, then wait about thirty seconds. The saline does most of the work; the syringe removes what it loosens.
- Squeeze the bulb before it goes near the nose. Squeezing after insertion blows air into the nostril.
- Insert only the very tip, about a centimetre, angled towards the back and side of the nose rather than straight up.
- Release the bulb slowly to draw the mucus out.
- Empty it onto a tissue, squeeze it out fully, and repeat on the other side if needed.
- Twice per nostril per session, and no more than a few sessions a day. More than that irritates.
Cleaning it, which is where most people fail
A bulb syringe is a warm, damp, enclosed space that has just had mucus in it. If it is not dried inside, it grows mould, and the mould is not visible from outside.
- Wash after every use: draw hot soapy water in, shake, expel, then repeat with clean water several times.
- Dry it tip-down in a glass so water drains out rather than pooling in the bulb.
- Squeeze it hard a few times while drying to move air through.
- Replace it if you ever see discolouration inside, and replace it periodically regardless.
- Some models come apart for cleaning, which is worth having.
The alternatives
- Saline drops or spray alone. Often enough on their own, and gentler. Worth trying first.
- A nasal aspirator with a tube, where the adult provides gentle suction through a filter. Many parents find these more controllable and easier to clean than a bulb.
- Steam from a hot shower in a closed bathroom for a few minutes before a feed.
- Upright holding when awake, which helps drainage. Do not prop or incline the cot for sleep — sleep stays flat and on the back.
When the blocked nose is not the problem
Call a doctor if a baby under three months has a temperature of 38°C or above, if breathing is fast or laboured, if you can see the skin sucking in under the ribs, if there are pauses in breathing, if feeding drops below about half the usual amount, or if the baby is unusually sleepy or floppy. A bulb syringe is for comfort — it is not a treatment for a baby who is working hard to breathe.
Questions parents ask
How often can you use a bulb syringe on a baby?
A few times a day at most, and no more than twice per nostril in one session, timed before feeds or sleep. Frequent suctioning irritates and swells the lining of the nose, which makes the congestion worse rather than better.
Do you use saline before a bulb syringe?
Yes — two or three drops in each nostril, left for about thirty seconds. The saline loosens the mucus and does most of the work; the syringe just removes what has been loosened. Saline alone is often enough.
How do you clean a bulb syringe?
Draw hot soapy water in and expel it several times, repeat with clean water, then dry it tip-down in a glass so water drains rather than pooling. Replace it if you see any discolouration inside — mould grows in the bulb and is invisible from outside.
Sources
This guide is general information, written to help you understand a topic and ask better questions — it is not medical advice and does not replace your own doctor, midwife or paediatrician. Anything that worries you about your baby belongs with them.