Cat hairballs form when swallowed fur collects in the stomach instead of passing normally through the digestive tract. Cats naturally ingest hair while grooming, and most swallowed fur eventually leaves in the stool. Sometimes, however, hairs accumulate into a damp mass that is vomited back up.

An occasional hairball can happen, particularly in long-haired or heavily shedding cats, but frequent hairball vomiting should not automatically be dismissed as normal. Veterinary literature notes that recurrent hairballs may reflect excessive fur ingestion, itchy skin disease or altered gastrointestinal function.

Quick Answer

A hairball is usually a moist, compact, cylindrical collection of fur brought up after retching. Reduce the amount of loose hair swallowed by grooming your cat appropriately and addressing excessive licking or shedding. Repeated hairballs, unproductive retching, vomiting, appetite loss, abdominal pain or breathing problems deserve veterinary attention rather than repeated home hairball remedies.

What Exactly Is a Hairball?

The medical term for a hairball is trichobezoar.

A cat’s tongue has backward-facing projections that help collect loose hairs during grooming. Because hair is largely composed of indigestible keratin, swallowed fur cannot simply be digested like food. Most travels through the digestive tract, but some can remain in the stomach and collect into a larger mass.

If that mass is expelled, you see what owners commonly call a hairball.

Why Hairballs Are Often Long Instead of Round

Despite the name, a vomited hairball often does not resemble a ball.

Cornell describes expelled hairballs as commonly slender or cylindrical because the mass is compressed as it travels through the oesophagus. Its colour may resemble the cat’s coat, although food and digestive fluid can change its appearance.

That can make a freshly produced hairball look surprisingly similar to a small piece of stool.

Is It Actually Normal for Cats to Get Hairballs?

There is no strong evidence supporting one universal “normal” number of hairballs per month.

Older veterinary owner guidance describes occasional hairballs as relatively common. However, a review published in the Journal of Feline Medicine and Surgery concluded that the evidence base is limited and that frequent hairball elimination—particularly in short-haired cats—can be associated with increased hair ingestion or underlying gastrointestinal disease rather than simply being normal feline behaviour.

That means Pawnium should avoid a rigid claim such as:

“One hairball every two weeks is normal for every cat.”

A better question is:

Is this occasional and typical for this individual cat, or is it frequent, increasing or accompanied by other changes?

Why Cats Develop Hairballs

Two broad processes matter:

More hair is swallowed, or hair is not moving normally through the gastrointestinal tract.

Veterinary sources identify increased fur ingestion from long coats, shedding, excessive grooming, fleas or itchy skin disease as potential contributors. Gastrointestinal disorders that affect motility can also make hair accumulation more likely.

Long-Haired Cats

Long-haired cats tend to be more prone to hairball problems because grooming can introduce a greater volume of long hair into the gastrointestinal tract. Cornell and VCA both identify long-haired cats as a higher-risk group.

That makes consistent coat care especially useful.

It does not mean repeated vomiting should automatically be accepted just because the cat is long-haired.

Short-Haired Cats Can Get Hairballs Too

A short coat does not eliminate hair ingestion.

Short-haired cats still swallow fur during normal grooming. However, frequent hairball vomiting in a short-haired cat deserves particular attention because feline veterinary literature associates recurrent episodes with possible skin or gastrointestinal problems.

Seasonal Shedding Can Increase Hair Ingestion

When more loose fur is present, more is available to be swallowed.

Cornell notes that hairballs may become more common during periods of heavier coat shedding.

Pawnium’s Cat Shedding Guide should remain the detailed resource for seasonal shedding and normal-versus-abnormal coat loss. Its current page already distinguishes a full, healthy shedding coat from baldness and inflammatory hair loss.

Grooming Is One of the Most Practical Preventive Measures

Regular brushing removes some loose hair before the cat has an opportunity to swallow it.

Cornell specifically recommends brushing and combing as a practical way to reduce loose-hair ingestion, while Merck similarly lists frequent brushing as a basic hairball-management strategy.

For the actual brushing technique, Pawnium already has a dedicated How to Brush a Cat page.

The hairball page should not repeat the complete brush-selection guide.

Do Not Aggressively Deshed the Coat

The goal is to remove loose fur comfortably, not strip as much coat as possible.

Pawnium’s brushing guide already establishes this distinction and specifically reserves the complete hairball discussion for this page.

Increase coat maintenance during heavier shedding when useful, but stop if the skin becomes irritated or the cat is uncomfortable.

Excessive Grooming Can Create More Hairballs

A cat that licks substantially more than usual may ingest more hair.

Excessive grooming may occur with itching, flea infestation, skin disease, pain or behavioural distress. Both the feline veterinary review and VCA identify excessive grooming as one pathway toward increased fur ingestion and hairball formation.

So:

more hairballs + noticeably increased licking

should not simply lead to stronger hairball paste or more brushing.

The increased grooming itself deserves investigation.

If baldness or shortened/broken hairs are developing, Pawnium’s Why Is My Cat Losing Hair? page should own that question.

If persistent itching is the dominant symptom, use Cat Itching but No Fleas.

Can Fleas Contribute to Hairballs?

Yes, indirectly.

Fleas can increase grooming and biting at the coat, which increases hair ingestion. The feline veterinary review specifically identifies flea infestation and pruritic skin disease as important contributors that can be overlooked in cats with recurrent hairballs.

This does not mean every cat with hairballs has fleas.

It means frequent hairballs plus itching or overgrooming should trigger a wider skin assessment.

Do Hairball Diets Work?

Some commercial diets are designed to increase dietary fibre with the aim of helping ingested hair move through the gastrointestinal tract. VCA describes these diets as one management option that a veterinarian may recommend.

However, evidence should not be overstated. The feline veterinary review found limited published objective evidence for many commonly marketed hairball-control diets and other preventive strategies.

Therefore avoid:

“This food will stop hairballs.”

Use:

“A veterinarian may recommend a hairball-control diet for some cats, but recurrent hairballs should first be considered in the context of coat, skin and gastrointestinal health.”

What About Hairball Pastes and Laxatives?

Do not routinely give laxatives, mineral oil or other gastrointestinal remedies without veterinary advice.

Cornell explicitly advises that laxatives used for hairball management should not be given without veterinary approval and supervision.

The same caution applies to frequent use of commercial hairball remedies.

If a cat repeatedly needs a product to avoid vomiting hair, it is worth asking why hair is accumulating so frequently.

Hydration

Normal hydration supports gastrointestinal health generally, but water should not be presented as a proven standalone hairball cure.

Provide normal access to fresh water and an appropriate complete diet, but avoid claims such as:

“Drinking more water will dissolve hairballs.”

Hair is composed largely of indigestible keratin and is not dissolved by additional water intake.

Hairball or Vomit?

A true expelled hairball usually contains an obvious compact collection of hair.

Vomiting may instead produce:

• partially digested food
• fluid
• foam
• bile-like material
• other stomach contents

A cat may also vomit around the same time as passing hair, so appearance alone does not always tell you why vomiting occurred.

Cornell advises veterinary evaluation when vomiting becomes frequent or is accompanied by lethargy, weakness, reduced appetite, blood, diarrhoea or other health changes.

Hairball or Cough?

This distinction is particularly important.

Cats coughing from airway disease may crouch, stretch the neck and make hacking movements that owners mistake for an unsuccessful hairball attempt. VCA specifically notes that feline coughing is commonly confused with trying to produce a hairball.

AAHA also emphasises that coughing itself is not caused by a hairball.

If repeated “hairball attacks” never produce hair, record a video for your veterinarian if you can do so safely.

Breathing Problems Are Different

Difficulty breathing, open-mouth breathing or blue/grey gums are not hairball symptoms and require urgent veterinary care. Severe feline asthma can produce respiratory distress and is a medical emergency.

When Frequent Hairballs May Signal Something Else

Recurrent hairballs may indicate that more fur is being swallowed than usual or that normal gastrointestinal movement has changed.

Potential underlying categories include:

• itchy skin disease
• fleas
• excessive grooming
• pain-related grooming
• stress-related overgrooming
• chronic gastrointestinal disease

VCA also notes that cats with underlying gastrointestinal disease may be more prone to trichobezoars because altered motility can interfere with normal passage of hair.

This list is not a diagnosis.

Older Cats

Do not automatically assume increasing hairballs are a normal consequence of ageing.

AAHA/AAFP life-stage guidelines specifically recommend asking about vomiting and hairball vomiting when evaluating mature and senior cats because these signs can help guide further medical investigation.

A new increase in a senior cat deserves more attention if it occurs with:

• weight loss
• appetite change
• diarrhoea
• constipation
• reduced grooming
• increased grooming
• lower activity
• other health changes

For broader monitoring, link to Cat Health Check at Home.

When a Hairball Can Become Dangerous

Most swallowed hair travels through the gastrointestinal tract, but a sufficiently large hair mass can occasionally become lodged and cause obstruction. Although this complication is uncommon, it can be serious.

Possible obstruction signs include:

• repeated vomiting
• repeated unproductive retching
• abdominal discomfort
• inability to keep food or water down
• reduced or absent bowel movements
• marked lethargy
• loss of appetite

VCA recommends veterinary treatment when a suspected obstruction prevents a cat from keeping food or water down.

When to Contact a Veterinarian

Arrange veterinary assessment when:

• hairballs are becoming noticeably more frequent
• the cat repeatedly retches without producing anything
• ordinary vomiting is occurring between hairballs
• appetite decreases
• weight changes
• diarrhoea or constipation develops
• excessive licking accompanies the hairballs
• bald patches or skin irritation are present
• the cat repeatedly appears to “cough up a hairball” but no hair is produced

Frequent elimination of hairballs can be associated with excessive fur ingestion or altered gastrointestinal function and deserves investigation rather than indefinite symptom management.

Seek Urgent Veterinary Care If

Seek prompt care for:

• repeated vomiting with inability to keep water down
• severe or persistent unproductive retching
• significant abdominal pain
• marked weakness or lethargy
• suspected intestinal obstruction
• open-mouth or difficult breathing

The first group can accompany serious gastrointestinal obstruction; breathing difficulty points toward a respiratory emergency rather than an ordinary hairball episode.

FAQs

How often is it normal for a cat to have a hairball?

There is no well-established universal frequency. Occasional episodes occur in cats, especially long-haired or heavily shedding individuals, but veterinary literature cautions that frequent hairball vomiting should not automatically be considered normal. A changing or recurrent pattern deserves discussion with your veterinarian.

How can I reduce my cat’s hairballs naturally?

The most evidence-supported practical step is regular coat-appropriate brushing to remove loose fur before it is swallowed. Also investigate excessive grooming, itching or unusually heavy shedding rather than treating every hairball as an isolated stomach problem.

Are hairballs more common in long-haired cats?

They tend to occur more often in long-haired cats because more or longer fur can be swallowed during grooming. Cornell and veterinary literature identify long coat length as a risk factor.

Why does my cat keep gagging but no hairball comes out?

Repeated unproductive retching deserves veterinary assessment. Also remember that coughing can look similar to an unsuccessful hairball attempt; cats with airway disease may crouch and extend the neck while coughing.

Can a hairball block a cat’s intestines?

Yes, although it is uncommon. A trichobezoar can occasionally become lodged in the gastrointestinal tract and cause obstruction. Repeated vomiting, abdominal pain, inability to keep food or water down or reduced bowel movements warrant prompt veterinary care.

Should I give my cat hairball laxative every week?

Not without veterinary guidance. Cornell specifically advises against giving laxatives for hairballs without veterinary approval and supervision. Frequent reliance on hairball products may also mask an underlying skin, grooming or gastrointestinal problem.