If it feels like your child’s cold just won’t go away, you’re probably not imagining it. Many parents say coughs and runny noses seem to last longer than they used to.
It’s not necessarily that kids are getting sicker. It’s that their young immune systems are still catching up.
James (Jim) Stangle, a pediatric nurse practitioner with Banner Children’s, answered our questions about what’s normal and when to be concerned.
Why kids’ immune systems may feel ‘out of practice’
Young immune systems learn through exposure and today’s kids might not have been exposed to as many germs when they were younger. So their immune “training” is delayed.
“Since the pandemic, kids seem to be catching everything. For a couple of years, children weren’t exposed to the usual parade of viruses because schools were closed, masking was common and social activities slowed down. Once life returned to normal, their immune systems had to play catch-up and that’s showing up as more frequent and sometimes more noticeable illnesses,” Stangle said.
While kids may be sick more often and for longer, that’s part of normal immune development. It doesn’t mean their immune systems are weaker. It means their immune systems are learning.
Why colds and coughs can seem to last longer
Your child’s airway can still be irritated after an infection clears. Even after a simple cold, a runny nose can last 10 to 14 days and a cough can last two to three weeks. Kids with asthma or allergies are prone to lingering coughs.
It’s normal for young children to have six to 10 viral illnesses a year and sometimes more. That adds up to a lot of time fighting coughs and congestion. By the time your child gets over one illness, they may catch another one.
Common symptoms that may stick around
After symptoms like fever and body ache are gone, your child may still have:
- Lingering cough, especially at night
- Runny or stuffy nose
- Mild fatigue for a week or two
- Occasional sore throat
- Interrupted sleep
- Less appetite
These symptoms should slowly get better. You should notice that, even with some symptoms, your child is eating, drinking and playing and has mostly normal energy levels. Gradual improvement is more important than how long symptoms last.
Could it be allergies instead of a cold?
Seasonal allergies can overlap with respiratory illnesses. Plus, since they cause similar symptoms, it can be hard to figure out which is to blame. They can make it seem like symptoms never end.
Common signs of allergies include:
- A runny nose with clear discharge
- Sneezing
- Itchy eyes
Colds and allergies can trigger coughs. But a cold is more likely to cause a wet cough, while a dry cough is more common with allergies. Allergies generally don’t cause fever, sore throat or body aches.
When to be concerned about a lingering illness
Reach out to your child’s pediatrician for advice if your child has:
- Symptoms lasting longer than two to three weeks
- Symptoms that aren’t getting better or get better and then get worse again
- High fever
- Long-lasting fever
- Trouble breathing or wheezing
- Signs of dehydration like dry mouth, not urinating as much or dark urine
- Ear pain
- Sinus pain
- Severe fatigue or not returning to normal activity
“If your gut is telling you something isn’t right, that’s enough reason to call. Parents know their kids best,” Stangle said.
How to support your child’s recovery
“The basics still work best,” Stangle said. That includes:
- Encouraging them to rest and sleep
- Make sure they drink plenty of fluids
- Offer balanced meals
- Use humidifiers or steam for comfort
- Try saline spray and suction, especially in younger kids
- Consider honey to help calm a cough in children over 1 year old
- Avoid unnecessary antibiotics
- If your child has asthma, follow their action plan
- Follow the guidance you get from your child’s pediatrician
The bottom line
“It can feel exhausting when your child seems sick again just after recovering. But in most cases, these are routine childhood viruses and kids are remarkably resilient. Over time, as their immune systems build experience, most families notice that the frequency and severity of illnesses decrease,” Stangle said.
If your child’s symptoms aren’t improving or you’re not sure what’s normal, a Banner Children’s provider can review their symptoms and recommend steps that can help.
FAQs
Why does my child’s cough last so long?
Coughs can last two to three weeks as the airways recover from infection.
Is it normal for kids to get sick back-to-back?
Yes it’s common, especially as their immune system develops.
How can I tell if it’s allergies or a cold?
Allergies often include itching and sneezing without fever.
When should I worry about a lingering cold?
If symptoms worsen, last longer than expected or affect breathing or energy.
Do longer illnesses mean a weak immune system?
No. It often reflects normal immune development.
