Advertisement
Germ-killing chemicals in the water can lead to respiratory issues
Chlorine has been dubbed the perfume of swimmers. Its bleach-like odor is unescapable at an indoor pool, after all. The smell of the germ-killing chemical clings to everyone splashing around in the water.
Advertisement
Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. Policy
But all that chlorine isn’t just leaving its scent on swimmers. In some cases, it also irritates airways after creeping into throats and lungs.
“Chlorine cough” serves as a soundtrack on many pool decks. So, what exactly is the condition and should swimmers be worried about it? Let’s dive into the topic with pulmonologist Rachel Taliercio, DO.
Chlorine is the most common disinfectant used in indoor and outdoor swimming pools. Trace amounts — we’re talking 1 to 3 parts per million — are added to pool water to kill any dangerous bacteria.
Problems start when chlorine binds to sweat, urine and other body waste floating around in pool water. (Bad news alert: There’s an alarming amount of pee in pools.)
Chlorine and this icky stuff combine to make chloramines, which can irritate your nose, throat and lungs. Chloramine-polluted air is heavier, too, leading it to settle at a height where you’re more apt to breathe it in.
In outdoor pools, these chlorine-related vapors dissipate quickly in the surrounding air and aren’t much of an issue.
But add chlorine to an indoor pool and fumes may linger in the contained space.
“If an indoor pool isn’t regulating its air well, swimmers can begin to see symptoms of tracheobronchitis, or chlorine cough,” says Dr. Taliercio. “You could experience coughing or wheezing. There might be some burning in your throat, too.”
Competitive swimmers are at greater risk for chlorine cough than recreational swimmers, as they spend more time in pools than the average person. People with asthma also may be more likely to experience chlorine cough.
Exposure to higher levels of chlorine in the air around indoor pools can increase your risk of breathing issues. The gases may cause the bronchial tubes in your lungs to spasm, a reaction called airway hyperresponsiveness.
Symptoms could include:
These issues may last for just a few hours or linger for days. If you train in an indoor pool and experience these symptoms regularly, talk to a healthcare provider.
Advertisement
The lungs of infants and toddlers aren’t fully mature. Given that, there’s a suggested (but not conclusive) association between new-onset asthma and swimming in an indoor pool at an early age.
But the relationship isn’t clear cut, emphasizes Dr. Taliercio, and some studies cast doubt on this cause-and-effect theory.
“I wouldn’t advise parents who hear about this chance of developing asthma to stop putting their kids in recreational swimming programs,” she continues. “There’s too much overall health benefits kids get from swimming.”
Let’s start with the obvious: If you’re swimming in an indoor pool and suddenly feel like you’re not breathing well, it’s time to get out of the water.
“In many cases, simply getting out of the pool and leaving will offer relief,” notes Dr. Taliercio. Getting in the shower right away to rinse off any chlorine and chloramines from your body also may help.
If problems persist, talk to a healthcare provider about options to reduce inflammation in your airways. You may also want to consider swimming at a different pool that uses a different water disinfectant (such as bromine) or offers better ventilation.
Advertisement
Learn more about our editorial process.
Advertisement
A more open conversation on athletes and their mental health needs is overdue
You can reduce your risk by not swallowing water, and showering before and after swimming
Make sure their bike is the right size, find a helmet that fits properly and teach them the rules of the road
Wait until they’re at least 6 months old before your little one takes their first dunk
Enteroviruses are often to blame for summer colds, leading to a runny nose, sore throat and digestive symptoms
This persistent myth isn’t true and can actually cause more pain than relief
Reducing your pace allows you to log more miles and train your body for the stress of running
Let your little one’s enthusiasm and motivation fuel their interest in running, but don’t pile on miles too early
Focus on your body’s metabolic set point by eating healthy foods, making exercise a part of your routine and reducing stress
PFAS chemicals may make life easier — but they aren’t always so easy on the human body
While there’s little risk in trying this hair care treatment, there isn’t much science to back up the claims