Hairspray can irritate your lungs, but for most people using it occasionally at home, the risk of lasting damage is low. In healthy subjects, inhaling hairspray causes only brief, reversible inflammation in the small airways. The real concern is frequency: the more often you inhale aerosolized particles, and the smaller those particles are, the deeper they travel into your lungs and the more trouble they can cause.
What Happens When You Breathe It In
A burst of hairspray releases a cloud of tiny droplets containing a mix of propellant gas, alcohol solvent, and the film-forming polymers that actually hold your hair in place. When you inhale that cloud, the largest droplets get trapped in your nose and throat. Smaller particles slip past those defenses. Roughly 85 to 88% of what deposits in your respiratory system lands in the head airways (nose, mouth, throat), about 5% reaches the bronchial tubes, and 7 to 10% makes it all the way down to the alveoli, the tiny air sacs where oxygen enters your blood.
It’s those deepest-penetrating particles that matter most. Submicron particles, representing 10% or less of the total spray mass, settle in the small airways and alveolar regions. Once there, they can trigger constriction of the small airways, producing a brief dip in how well you can move air in and out. In studies on healthy volunteers, these changes were short-lived and reversed on their own.
Aerosol Cans vs. Pump Sprays
The type of hairspray you use makes a meaningful difference in how much reaches your lower lungs. Propellant-based aerosol cans produce particles with an average size of 25 to 50 micrometers, and about 15% of those particles are small enough (under 10 micrometers) to penetrate past the throat and into the lungs. Pump sprays, by contrast, produce much larger droplets averaging around 70 micrometers. Only about 0.5% of pump spray particles are small enough to reach deep lung tissue.
That’s a 30-fold difference in the proportion of respirable particles. If reducing inhalation risk matters to you, switching from an aerosol can to a pump spray is the single most effective change you can make.
Short-Term Irritation
The most common immediate effects of breathing in hairspray are irritation of the mucous membranes in your eyes, nose, and throat, along with coughing and a sore feeling in the chest. One hairdresser in a NIOSH health evaluation reported that a particular hairspray product consistently caused eye and nasal irritation, coughing, and chest soreness. These symptoms typically resolve quickly once you stop being exposed.
People with asthma, chronic bronchitis, or emphysema are more vulnerable. Chemical aerosols, including hairspray, can worsen symptoms in people who already have these conditions. Hairspray falls into the same category as strong perfumes, bathroom cleaners, and cigarette smoke as a common respiratory irritant that can trigger flare-ups.
Risks for Hairdressers and Heavy Users
The clearest evidence of harm comes from people exposed to hairspray all day, every day. A study of 184 hairdressers in Turkey found that 14.6% had occupational asthma, roughly double the rate in the general population. Among those hairdressers, nearly 9% reported chronic dry cough, about 4% experienced shortness of breath, and 3.3% had wheezing or chest tightness. The risk of asthma increased with work intensity, meaning more hours and more spray use translated to higher rates of disease.
In rare cases, heavy or prolonged exposure has been linked to a more serious condition called interstitial pneumonitis, where the lung tissue between the air sacs becomes inflamed and scarred. One documented case involved a patient whose CT scan showed hazy patches throughout the lungs, and a biopsy revealed thickened walls between the air sacs with collagen buildup. This pattern is associated with a type of lung scarring. However, even among hairdressers who are continuously exposed to hairspray, the frequency of this kind of lung inflammation remains low. In most reported cases, the condition improved once exposure stopped.
The Chemical That Raised Early Alarms
Back in 1958, researchers described a condition they called “thesaurosis,” or storage disease, in two young women exposed to hairspray. They attributed it to polyvinylpyrrolidone (PVP), the polymer that was the main film-forming ingredient in hairsprays at the time. The concern was that PVP particles deposited in the lungs and couldn’t be cleared, leading to granuloma-like lesions.
Later research showed the picture was more complicated. When scientists tested hairsprays with and without PVP, both types caused similar short-term changes in airway function. The irritation wasn’t unique to PVP. It came from inhaling fine aerosolized particles in general. Many modern hairsprays have moved away from PVP, but the basic mechanism of irritation, tiny particles reaching the small airways, remains the same regardless of the specific polymer used.
Spray Products and Asthma Risk
A large international study tracking over 3,500 adults found that using any type of cleaning or household spray at least once a week increased the risk of developing new asthma symptoms by about 49% compared to non-users. People who used sprays four or more days per week had roughly double the risk of receiving a new asthma diagnosis. Notably, the same cleaning products applied in non-spray form (liquids, wipes) showed no association with asthma at all.
This study focused on cleaning sprays rather than hairspray specifically, but the finding underscores a broader principle: the spray delivery method itself is a risk factor. Aerosolizing any chemical mixture creates inhalable particles that wouldn’t otherwise reach your airways. The more frequently you create that exposure, the greater your cumulative risk.
How to Reduce Your Exposure
You don’t necessarily need to give up hairspray, but a few changes can dramatically cut down on what your lungs absorb. Use it in a ventilated space. A bathroom with an exhaust fan running, or even just an open door, helps disperse the aerosol cloud before you breathe it in. Hold your breath during and immediately after spraying, then step away from the cloud for a few seconds before inhaling normally.
Switching from an aerosol can to a pump spray reduces the proportion of lung-penetrating particles from about 15% down to 0.5%. Spraying at arm’s length and directing the nozzle at your hair rather than your face also limits what drifts toward your nose and mouth. If you already have asthma or another chronic lung condition, these steps matter more for you than for the average person, since your airways are already primed to react to irritants.