The two look remarkably similar, which is why so many cat owners end up searching this exact question. Both involve crouching, neck stretching, and alarming sounds. But a cough and a hairball attempt are different events with different causes, and telling them apart matters because a persistent cough can signal asthma or other respiratory disease that veterinarians frequently see misidentified as “just hairballs.”
How Each One Looks and Sounds
During a hairball episode, your cat will typically hunch down with the neck extended forward and make deep, rhythmic hacking sounds. You’ll hear gagging, retching, or a wet gurgling noise, and the cat’s back may arch as abdominal muscles contract to push the hair up. The key detail: something eventually comes out. It might take a few rounds of retching, but the episode ends with a tubular wad of compressed fur on your floor.
A cough can look almost identical at first glance. Your cat crouches low, extends the neck, and produces repeated wheezing or raspy sounds. The critical difference is that nothing comes up. No fur, no vomit. The cat may stay hunched over longer, appear uncomfortable afterward, and sometimes lose interest in food or play. If you’re watching closely, a cough tends to sound drier and more consistent in rhythm, while a hairball attempt builds toward a productive retch.
Cats with asthma adopt a characteristic posture: crouched with the head and neck thrust forward, wheezing or coughing in bouts. Owners commonly describe this as their cat “trying to vomit a hairball but nothing comes out.” That specific observation, repeated dry heaving with no result, is one of the most common ways feline asthma first gets noticed.
Why the Confusion Is So Common
This isn’t just a casual mix-up. Veterinary literature specifically notes that cats with asthma often present because owners believe their cat is struggling with hairballs. The typical pattern is paroxysmal bouts of coughing that sometimes trigger vomiting at the end, or episodes where the cat appears to dry-heave without producing anything. Because owners expect hairballs to be a normal part of cat life, the coughing can go unaddressed for months.
The assumption that frequent hairballs are normal deserves a closer look, too. A study published in the Journal of Feline Medicine and Surgery found that only about 10% of healthy shorthaired cats regularly bring up hairballs (defined as two or more per year), with longhaired cats roughly double that rate. In shorthaired cats especially, frequent hairball vomiting may itself point to an underlying issue like gastrointestinal disease, skin conditions, or flea problems causing excessive grooming. So even if your cat is producing actual hairballs, doing so often isn’t necessarily harmless.
What a Persistent Cough Could Mean
If your cat is repeatedly coughing without producing a hairball, several conditions could be responsible.
Feline asthma is the most common culprit. Cats with stable asthma have a chronic or episodic pattern of coughing, wheezing, and faster breathing. During a severe flare (called status asthmaticus), a cat may breathe with its mouth open, breathe rapidly, and visibly push with its abdomen on each exhale. Asthma is found in cats worldwide and across all breeds.
Heartworm-associated respiratory disease can look similar but has some distinguishing features. Cats with heartworm disease may show lethargy, coughing, rapid breathing, vomiting, and weight loss. Their breathing difficulty tends to involve effort on both the inhale and exhale, whereas asthma primarily affects the exhale. Heartworm disease in cats is less common than in dogs, estimated at 5 to 10% of the canine rate in any given area, but it does occur and can cause sudden, severe symptoms.
Respiratory infections and lungworm are less common but also produce chronic coughing. These are typically identified through diagnostic testing when asthma treatment alone doesn’t resolve the problem.
A Quick Way to Tell Them Apart at Home
Record a video. This is genuinely the most useful thing you can do. Coughing episodes are often short and your cat will rarely perform on cue at the vet’s office. A 30-second clip gives your veterinarian far more diagnostic information than a verbal description.
While recording, pay attention to three things:
- Does anything come up? A hairball episode ends with expelled fur. A cough produces nothing, or occasionally a small amount of clear mucus.
- What does it sound like? Hairball retching has a wet, gagging quality that builds in intensity. Coughing sounds drier, wheezier, and more repetitive.
- How often is it happening? A hairball once every few months in a longhaired cat is within the normal range. Weekly or daily episodes of hacking with nothing produced point strongly toward a respiratory problem.
Signs That Need Immediate Attention
Most coughing and hairball episodes, while unpleasant to watch, resolve on their own within a minute or two. But certain signs indicate your cat is in respiratory distress, which is always an emergency. Open-mouth breathing in cats is never normal and always warrants urgent care. Other red flags include blue or purple gums, an inability to settle or visible panic, standing with elbows splayed outward and neck stretched, exaggerated chest or belly movement with each breath, and collapse. Any of these signs mean your cat needs veterinary help immediately, not at the next available appointment.
Reducing Hairballs
If your cat genuinely is producing hairballs rather than coughing, regular brushing is the single most effective prevention. Removing loose fur before your cat swallows it during grooming directly reduces the raw material for hairball formation. For longhaired breeds, daily brushing makes a noticeable difference.
Hairball-formula cat foods typically contain higher fiber levels to help fur pass through the digestive tract rather than accumulating in the stomach. Petroleum-based hairball pastes work on the same principle, lubricating the gut to keep things moving. These are reasonable options for occasional hairball issues, but if your cat is vomiting hairballs frequently, addressing the cause of excessive fur ingestion (skin irritation, fleas, stress-related overgrooming) is more effective than treating the symptom.
For cats that turn out to have a cough rather than a hairball problem, these remedies won’t help. That’s another reason getting the distinction right matters: a cat with undiagnosed asthma won’t improve with hairball paste, and the delay in proper treatment can allow the condition to worsen over time.