Understanding Cystic Fibrosis -- Symptoms

Medically Reviewed by Nayana Ambardekar, MD on April 21, 2021

What Are the Symptoms of Cystic Fibrosis?

The symptoms of cystic fibrosis vary. Some children will have symptoms at birth, while others may not have symptoms for weeks, months, or even years.

The severity of symptoms also varies, with some children showing only mild digestive and lung problems and others having severe food-absorption problems and life-threatening breathing complications.

The most common symptoms of cystic fibrosis are:

Over time, the symptoms of cystic fibrosis can worsen and may include:



Call Your Doctor About Cystic Fibrosis If:

  • You are pregnant or planning to become pregnant and either you or the other parent has a family history of cystic fibrosis
  • Your child tastes very salty when you kiss them
  • Your child has had frequent lung or sinus infections and has problems gaining or maintaining weight


Show Sources


Cystic Fibrosis Foundation. 

The Mayo Clinic. 

The New England Journal of Medicine.

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