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Nurse just booked my 5yo in for a sweat test. Could it be CF? Looking for others’ experiences

6 replies

Bambooparty · 29/07/2025 20:56

Hi all,

I’m really hoping to hear from any parents whose children were diagnosed with cystic fibrosis (especially if it wasn’t picked up at birth), just to get a sense of what led to the diagnosis and what symptoms you noticed.

My son is 5 and has had ongoing health issues since he was a baby. He’s had frequent chest infections since around 6 months old and has been hospitalised three times in the last year. We’ve been told it might be asthma, but because they can’t properly test until age 7, nothing is confirmed yet.

He has a constant cough, gets breathless easily, and struggles to keep up with other kids his age. His tummy is often bloated, and his poos have always been bulky and extremely smelly, though he’s never been constipated. He’s had persistent sinus infections since birth, with inflamed nostrils almost constantly, and has had his tonsils and adenoids removed due to sleep apnoea. He also has a dust mite allergy.

He’s always really sweaty, especially at night, and drinks huge amounts of water. His skin also tastes salty, which I honestly never thought much of until now.

Today, the nurse called to book him in for a sweat test, and I’m absolutely terrified. He seems to tick so many boxes, and I can’t stop thinking about it. I’ve had a gut feeling for a while that something more was going on, and now it feels like all the pieces are coming together, albeit in the scariest way.

If anyone has been through this, especially with a diagnosis that came a bit later, I’d really appreciate hearing what symptoms your child had and how things unfolded. It would be such a help to not feel so alone while we wait.

Thank you so much.

OP posts:
Beautifulsunflowers · 29/07/2025 22:41

No advice but just bumping for you.
What a worrying time for you and your family.

Bambooparty · 29/07/2025 22:56

Beautifulsunflowers · 29/07/2025 22:41

No advice but just bumping for you.
What a worrying time for you and your family.

Thank you for the kind words 💐

OP posts:
igglepigglegingin · 29/07/2025 22:56

Sweat test is common for kids with asthma and allergies in a young age.

RosesAndHellebores · 29/07/2025 23:02

DS had a sweat test at 7/8 months old due to persistent wheezing after bronchiolitis and pneumonia at 4 and 5 months.

I hope all is well for you and your boy op. I might gently ask why the hcps did not do this much, much earlier.

lezsucks · 29/07/2025 23:10

Very similar experience to you at a similar age. Hot sweaty child, underweight, snotty, recurrent chest infection, wet poo. They also checked for responses to vaccines, found to not have responded to one. The sweat test was negative, given a repeat vaccine and he's been great ever since.
I hope you have a similar outcome. It was a very stressful time.

PragmaticIsh · 29/07/2025 23:25

It might also be worth asking for a blood test to rule out coeliac disease. Those symptoms raise a few flags for that.

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