Common Cold in Babies: Symptoms and What You Can Do

Your baby has a stuffy nose, is sneezing, and is more unsettled than usual. You're wondering if it could be a cold and what you can do to help. It's a situation almost every parent knows well.

The common cold is the most frequent infectious illness in children. Young babies can have six to ten colds per year, and for babies under one year old, each one feels new and unfamiliar. The good news is that the vast majority of colds clear up on their own, and there are simple things you can do at home to ease the discomfort.

Here's a trustworthy guide to symptoms, home care, and when to contact a doctor.

Common Colds in Babies: Completely Normal

Colds are caused by viral infections of the upper respiratory tract. Over 200 different viruses can cause a cold — rhinovirus is the most common. Other frequent causes include RSV (respiratory syncytial virus), influenza, and various other respiratory viruses.

Babies are especially vulnerable because their immune systems are still immature. They simply haven't had time to build up resistance to all the circulating viruses. Every encounter with a new virus is a training session for the immune system.

Babies in daycare or with older siblings tend to get even more colds. That's tiring, but completely normal. Each cold builds the immune system a little more.

Symptoms of a Cold

A cold in a baby typically starts with a few mild signs that develop over a couple of days.

Common symptoms:

• Runny or stuffy nose (clear mucus that may become thicker and yellow-green after a few days)
• Sneezing
• Mild cough
• Watery eyes
• Low-grade fever (rarely above 101°F / 38.5°C with a simple cold)
• Reduced appetite
• Disrupted sleep

A typical cold lasts seven to ten days. The runny nose is usually worst on days two to four, and the cough can linger for up to two weeks after other symptoms have cleared.

How to Help Your Baby at Home

Most colds don't need medical treatment. But there are several things you can do to make your baby more comfortable.

Saline Drops (Salt Water)

Saline drops (0.9% sodium chloride) are your most important tool. A few drops in each nostril loosen mucus and make breathing easier. Saline nasal drops are available over the counter at any pharmacy.

For babies under 6 months: Drop saline in each nostril just before each feeding. Then use a nasal aspirator (bulb syringe) or a damp cloth to gently remove the mucus. Babies this age breathe primarily through their nose, so this makes an enormous difference to feeding.

For babies over 6 months: Use saline drops morning and evening, and as needed. The baby manages more on their own, but the drops still make breathing easier.

Elevated Head Position

Place a rolled towel or thin wedge under the mattress (not directly under the baby) so the head is about 4–8 inches higher than the rest of the body. This helps mucus drain rather than pool, and makes it easier to breathe during sleep.

Humidity and Fresh Air

Dry indoor air makes a stuffy nose worse. Air the room regularly and consider using a cool-mist humidifier in the bedroom. A damp towel placed near (not over) a radiator can also help.

Plenty of Fluids

Offer breast or bottle more frequently than usual. Babies with stuffy noses often manage shorter feeds, but need just as much fluid as normal. Frequent, small feeds work better than waiting for usual mealtimes.

Stuffy Nose and Breastfeeding: Practical Tips

Nursing a baby with a blocked nose can be frustrating for both of you. Your baby is struggling to breathe and feed at the same time, and may become agitated at the breast.

Some strategies that help:

• Clear the nose before each feed with saline drops and gentle suctioning
• Feed in a more upright position — the football hold or sitting upright helps mucus flow down rather than blocking
• Shorter, more frequent sessions — it's fine if the baby needs breathing breaks during feeding
• Keep your patience — it might take a few extra minutes, but the baby will get what they need

Cold Medicines: What Actually Works?

Here's the important truth: cough and cold medicines are not recommended for babies and young children. Major health authorities including the FDA and AAP advise against using over-the-counter cold remedies in children under 4 — they haven't been shown to help and can cause side effects.

What you can use:

• Acetaminophen (paracetamol) — only if the baby has a fever over 101°F (38.5°C) or is clearly uncomfortable. Follow the dosing for your baby's weight.
• Saline nasal drops — safe, effective, and available without prescription
• Honey — may soothe a cough, but only for children over 12 months (never give honey to babies under 1 year due to the risk of botulism)

What to avoid:

• Cough syrups and cold combination medicines
• Nasal decongestant sprays (oxymetazoline, xylometazoline) in young children
• Herbal remedies without medical guidance

When to Call the Doctor

Most colds in babies don't need medical attention. But some situations require you to make contact.

Call Emergency Services (911) if your baby:

• Has severe breathing difficulty (chest retractions, blue lips or fingertips)
• Is unresponsive or very difficult to wake
• Stops breathing

The younger the baby, the lower your threshold should be for calling. For newborns under three months, any fever is reason to call.

Preventing Colds

You can't protect your baby from all colds, but you can reduce the frequency.

Good habits:

• Wash your hands — the simplest and most effective prevention. Always wash your hands before handling the baby and ask visitors to do the same
• Avoid sharing cups, utensils, and pacifiers
• Ventilate daily — fresh indoor air reduces viral concentration
• Keep distance from sick people — ask family members with colds to wait until they're better before close contact
• Breastfeeding — breast milk gives babies antibodies that strengthen the immune system

The daycare reality: Children in daycare get more colds than home-reared babies, especially in the first year. That's unavoidable. The silver lining is that they build their immune systems faster and typically have fewer infections once they start school.

Frequently Asked Questions

How long does a cold last in a baby?

A typical cold lasts seven to ten days. The cough can linger for up to two weeks after other symptoms have cleared. If there's no improvement after ten days, contact your doctor.

When can the baby go back to daycare?

The baby can return when their general condition is good and they can participate in normal activities. They don't need to be completely symptom-free — a little residual cough and runny nose is fine. Check your daycare's own illness policy.

When is a baby most contagious?

Babies are most contagious in the first two to three days after symptoms appear. They can spread the virus as long as they have symptoms, but infectiousness decreases after the first few days.

Can I bathe a baby when they have a cold?

Yes. A lukewarm bath can be soothing and help loosen mucus. The steam from warm water works like a mild inhalation treatment. Dry the baby well and dress them warmly afterward.

Should I use a humidifier?

A cool-mist humidifier can help if the indoor air is very dry, as it often is in centrally heated homes during winter. Clean it regularly to prevent bacterial growth.

Sources

1. AAP — Cold and Flu Season: When to Call the Doctor
2. CDC — Common Cold
3. WHO — Acute Respiratory Infections in Children
4. NHS — Common cold in babies