What helps a baby's first cold and when should I see the GP?
Most first colds are miserable but harmless. Here's what helps at home and the short list of signs that mean pick up the phone.
In short
A baby's first cold usually looks worse than it is and passes on its own in around a week or two. Saline drops, a nasal aspirator and smaller, more frequent feeds help most. In a baby under 3 months, a temperature of 38 degrees C or above needs same-day medical advice.
- Babies are nose-breathers, so a blocked nose mainly disrupts feeding and sleep; clear it before feeds and sleep.
- Colds are viruses, so antibiotics do not help.
- Do not use over-the-counter cough and cold medicines for young children.
- Ring the GP if baby is feeding much less than half the normal amount or has fewer wet nappies than usual.
- Difficulty breathing, blue or grey lips, a rash that does not fade, floppiness or a seizure mean 112 or 999.
The first time your baby gets a cold, it's frightening. The snuffling, the rattly little cough, the disturbed feeds. So let's start with the reassuring bit: colds are extremely common, small children catch several a year, and once creche or older siblings are in the picture it can feel like one long cold from October to March.
A first cold usually looks worse than it is. Snuffles, sneezing, a mild cough, a mild temperature, a baby who's a bit off form. That's the normal shape of it, and it passes on its own in around a week or two.
Why does a blocked nose bother a baby so much?
Babies are nose-breathers. When your nose is blocked you switch to breathing through your mouth without thinking about it. A small baby mostly can't, so a stuffed-up nose bothers the two things you care about most: feeding and sleep.
That's why so much of managing a baby's cold is really just managing the nose.
What can I do at home for my baby's cold?
- Saline drops or spray before feeds. A few drops of saline in each nostril loosens the congestion just when it matters most.
- A nasal aspirator. The snot sucker feels ridiculous the first time. It works. Clearing the nose before feeds and sleep makes a real difference.
- Smaller, more frequent feeds. A snuffly baby tires quickly at the breast or bottle. Little and often keeps the fluids going in.
- Keep baby upright for feeds. Gravity is on your side.
- A normal-temperature room. Not overheated. Warm and stuffy doesn't help a congested baby.
- Extra cuddles and patience. Genuinely part of the treatment.
One thing that doesn't help: antibiotics. Colds are viruses and antibiotics don't work on viruses, so don't be surprised or disappointed if the GP doesn't prescribe any.
Can I give my baby cold medicine?
Do not use over-the-counter cough and cold medicines for young children. They're not suitable at this age.
For pain or fever relief, whether and what to give depends on your baby's age and weight. Rather than guessing, ask your pharmacist, GP or PHN, and follow the label exactly. This post deliberately gives no doses because the right answer is different for every baby.
What temperature is a fever in a baby?
A fever is 38°C or above. And here is the one line worth memorising: in a baby under 3 months, any temperature of 38°C or above needs same-day medical advice. Not tomorrow, not "we'll see how she is in the morning". Same day. In an older baby a mild temperature with a cold is usually just part of the cold, but under 3 months the rules are stricter and that's on purpose.
When should I ring the GP about my baby's cold?
| You can usually ride it out | Get medical advice |
|---|---|
| Snuffles, sneezing and a mild cough | Baby under 3 months with a temperature of 38°C or above (same day) |
| Feeding okay, even if slower and grumpier than usual | Feeding much less than half the normal amount |
| Normal number of wet nappies | Fewer wet nappies than usual |
| Baby alert and rousable, having good spells between the misery | Temperature that persists, or baby getting worse rather than better |
| A mild temperature in an older baby that settles | Ear pulling with distress, or a cough lasting more than a few weeks |
If anything in the right-hand column is happening, ring the GP. That's what they're there for.
When is a baby's cold an emergency?
These signs mean 112 or 999, or straight to the emergency department:
- Difficulty breathing: grunting, ribs sucking in, nostrils flaring or pauses in breathing
- Blue or grey lips or skin
- A rash that does not fade when pressed with a glass
- Baby unusually floppy, or drowsy and hard to wake
- A seizure
And trust your instincts. If you're frightened, seek help. Nobody sensible will ever criticise a parent for getting a sick baby checked.
How do I know if my baby is feeding less than usual?
Compare today with a normal day: is she taking much less than half her usual amount, and are there fewer wet nappies than usual? Those are the two numbers the GP will ask about, and they are hard to answer from memory at 3am. Lullagram's feed and nappy logs show exactly what a normal day looks like and exactly how today compares, for both parents. It is free to try on Android, iPhone and web.
The HSE has full guidance on colds and coughs in children if you want the official version alongside the practical.
Sources and guidance
This guide is written to be consistent with the official guidance below. It is general information for parents in Ireland, not medical advice. Links checked 17 September 2026.
I've used the app since my now 3 month old was born and it's honestly brilliant. Very handy when me and my husband were doing handovers, no one needed to be woken up or questioned! Great resource for the public health nurse when we had concerns about feeding etc, it was all recorded in the app. It's also really refreshing to have an app like this geared towards parents in Ireland.