Cystic fibrosis living

Overview

Cystic fibrosis (CF) is a genetic condition that affects the cells making mucus, sweat, and digestive juices. Normally these fluids are thin and slippery, but in CF they become thick and sticky, clogging up tubes and passages, mainly in the lungs and digestive system.

CF is rare. It is the most common serious inherited condition in some populations, especially people with northern European ancestry, but it can affect all groups.

Most people are diagnosed in childhood, sometimes as newborns. It affects males and females fairly equally. Improvements in care mean many people with CF now live well into adulthood and even middle age.

Symptoms

Common symptoms

• A cough that doesn't go away or a cough that brings up thick mucus
• Frequent chest infections, such as pneumonia or bronchitis
• Salty-tasting skin
• Difficulty putting on weight or growing as expected
• Bulky, greasy, or foul-smelling stools (poo)

Symptoms in children

• A delay in passing the first stool (poo) in babies, known as meconium ileus
• Poor weight gain or failure to thrive
• Wheezing or rapid breathing
• Recurrent chest or sinus infections

Symptoms in older adults

• More subtle symptoms, like chronic sinusitis, trouble gaining weight, or low energy
• Fertility problems (in males especially)
• Clubbing of fingertips (nail changes)
• Some people are diagnosed in adulthood after years of milder lung or gut symptoms

Causes

Main causes

• A change (mutation) in the gene called CFTR, which normally controls how salt and water move in and out of cells
• When the CFTR protein doesn't work properly, the body makes thick, sticky mucus and very salty sweat
• A child must inherit a faulty CFTR gene from both parents to develop CF

Risk factors

• Having a family history of cystic fibrosis
• Being of northern European (Caucasian) ancestry
• Having parents who are both carriers of a faulty CFTR gene (they may not have the condition themselves)

When to see a doctor

See a doctor urgently if:

• Contact your CF care team or seek same-day medical advice if you have a new fever, more mucus, or pain that is not settling.

Book a routine appointment if:

• People with CF should have regular check-ups with their specialist CF team — usually every 2 to 3 months even when they feel well.

Diagnosis

CF is usually found through newborn screening, or later through a combination of symptoms, a sweat test, and a genetic blood test.

Tests that may be done

• Sweat test — a painless test that measures the amount of salt in your sweat (high levels suggest CF)
• Genetic test — a cheek swab or blood test that looks for the faulty CFTR gene
• Lung function tests — breathing tests that show how well your lungs are working

What to expect at your appointment

A team of specialists will talk you through the results and what they mean for you or your child. If CF is confirmed, you will meet a nurse, dietitian, physiotherapist, and doctor who will guide you through the next steps.

Treatment

Treatment for CF is not a one-off fix — it is a daily, team-based plan to keep the lungs clear, maintain good nutrition, and prevent infections. There is currently no cure, but treatments can slow the disease and improve quality of life.

Self-care at home

• Do airway clearance exercises every day — a physiotherapist can teach you the best techniques for your age
• Take digestive enzyme capsules with food and snacks if prescribed by your team
• Drink plenty of fluids and have a little extra salt, especially in hot weather or during exercise
• Avoid cigarette smoke and try to stay away from people with colds or flu

Medical treatments

Medical care includes medicines inhaled or taken by mouth to thin mucus and open the airways, medicines that replace missing digestive enzymes, antibiotics for infections, and newer 'modulator' therapies that help the faulty CFTR protein work more normally. Your specialist team will prescribe the right plan for you — always follow their advice.

When is surgery considered?

Some people may need surgery for complications, such as clearing a bowel blockage, removing nasal polyps, or lung transplant in very advanced disease.

Living with this condition

Living with CF means building a daily routine of medicines, airway clearance, meals, and rest. It helps to involve family and friends so the routine does not feel overwhelming.

Lifestyle tips

• Keep up with physiotherapy exercises even when you feel well
• Make time for school, work, hobbies, and friends — CF is part of life, not all of it
• Plan ahead for trips and hospital appointments by carrying supplies and medicines
• Get regular check-ups and speak up early about any new symptoms

Diet and exercise

CF makes it harder to absorb fat and calories, so a high-energy, high-protein diet with extra salt is often recommended. Work with your dietitian to find meals you enjoy. Regular gentle exercise — like walking, cycling, or swimming — helps clear mucus and keeps your heart and lungs strong.

Mental health and emotional wellbeing

Living with a long-term condition can be stressful. It is completely normal to feel worried, low, or frustrated at times. Talking to family, friends, or a counsellor can help, and your CF team can support your emotional health too.

Prevention

CF is passed down in genes, so it cannot be prevented. If you have a family history, genetic counselling can help you understand your chances of passing on the faulty gene.

Vaccines

People with CF should stay up to date with recommended vaccines, including the flu, pneumococcal, and COVID-19 vaccines. Check with your care team.

Screening programmes

Newborn screening is done in many countries. If you are planning a family, carrier screening can tell you whether you and your partner carry the gene.

Complications

If left untreated

• Ongoing lung damage, leading to breathing failure
• Poor growth and malnutrition
• Increased risk of diabetes, liver disease, and earlier lung infections
• Reduced quality of life and shorter life expectancy

Long-term outlook

With modern care, many people with CF live well into their 30s, 40s, and beyond. Life expectancy has improved dramatically in recent decades, and research into new treatments continues to bring hope. Living with CF is challenging, but with your care team and a strong daily routine, you can still enjoy a full and active life.

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