Hairballs in Cats: Causes, Prevention, and When to Worry

Hairballs are one of the most commonly accepted, and least discussed in detail, parts of cat ownership. Most cats produce them occasionally, and it’s a normal byproduct of their meticulous grooming habits. But frequent hairballs, or vomiting that doesn’t actually produce a hairball, deserve a closer look rather than automatic acceptance.

Key Takeaways

• Hairballs form because cats swallow loose fur during self-grooming, which can accumulate in the stomach instead of passing through the digestive tract.
• Occasional hairballs (roughly once every few weeks or less) are generally normal, especially in longhaired cats.
• Frequent hairballs, or frequent unproductive retching, can indicate excessive grooming, an underlying digestive issue, or in rare cases, a dangerous blockage.
• Regular brushing is the single most effective way to reduce hairball frequency.

Why Cats Get Hairballs

Cats are meticulous self-groomers, and their tongues are covered in small, backward-facing barbs called papillae that catch loose fur as they groom. Most of this swallowed fur passes through the digestive tract and out in the stool without issue. However, some fur can accumulate in the stomach, particularly in cats that groom frequently or have longer, thicker coats, eventually forming a hairball that gets vomited back up.

Which Cats Are More Prone to Hairballs

• Longhaired breeds, such as Maine Coons, Persians, and Ragdolls, due to simply having more fur to ingest during grooming.
• Heavy shedders, particularly during seasonal shedding periods.
• Cats that over-groom, often linked to stress, anxiety, skin irritation, or allergies, which increases the amount of fur ingested.
• Older cats, who may groom differently or have slower digestive motility.

What a Normal Hairball Looks Like

A typical hairball appears as a cylindrical, tube-like mass (shaped by passing through the narrow esophagus) rather than a round ball, despite the name. It’s often preceded by retching and gagging, and once passed, your cat typically returns to normal behavior right away.

When Hairballs Are More Than a Normal Nuisance

Frequency

If your cat is producing hairballs more than about once every few weeks, or the frequency has noticeably increased, it’s worth mentioning to your veterinarian rather than assuming it’s simply “how this cat is.”

Unproductive Retching

Repeated retching or gagging that doesn’t actually produce a hairball can be a sign of a partial blockage or another digestive issue and should be evaluated.

Accompanying Symptoms

Watch for appetite loss, lethargy, constipation, diarrhea, or repeated vomiting that isn’t clearly hairball-related, all of which suggest something beyond typical grooming-related hairballs.

Signs of a Blockage

In rare but serious cases, a large hairball can cause a genuine gastrointestinal obstruction. Signs include persistent vomiting, loss of appetite, lethargy, and abdominal discomfort. This requires urgent veterinary attention and sometimes surgical removal.

How to Reduce Hairballs

Brush Regularly

Removing loose fur through regular brushing before your cat ingests it during self-grooming is the single most effective prevention strategy. Longhaired cats benefit from brushing several times a week; shorthaired cats can often do well with weekly brushing. If your cat resists the brush altogether, our guide on grooming a cat that hates being brushed can help build tolerance gradually.

Consider a Hairball-Control Diet or Supplement

Some commercial cat foods and supplements are formulated to support healthy digestion and hairball passage, often with added fiber. Ask your veterinarian whether this might help your specific cat.

Address Excessive Grooming

If your cat is over-grooming due to stress, skin irritation, or allergies, addressing that underlying cause reduces the amount of fur ingested in the first place, which in turn reduces hairball frequency.

Encourage Hydration

Adequate water intake supports healthy digestion generally, which may help hair pass through the digestive tract more easily rather than accumulating.

Use a Hairball Remedy Gel (With Veterinary Guidance)

Some lubricant-based hairball remedies can help hair pass through the digestive tract, though these should be used following product or veterinary guidance rather than as an unlimited daily supplement.

Frequently Asked Questions

How often is it normal for a cat to have a hairball? Roughly once every few weeks or less is generally considered within normal range, particularly for longhaired cats. More frequent hairballs are worth discussing with your veterinarian, since they can sometimes indicate excessive grooming or an underlying digestive issue.

Do shorthaired cats get hairballs too? Yes, though typically less often than longhaired cats, since they simply ingest less fur during grooming. Any cat can develop hairballs, especially during seasonal shedding periods.

Can hairballs be dangerous? Most hairballs pass without serious issue, but in rare cases, a large hairball can cause a genuine intestinal blockage, which is a medical emergency requiring veterinary care, sometimes including surgery.

Do hairball prevention treats actually work? Many hairball-control diets and treats contain added fiber intended to support fur passage through the digestive tract, and some owners find them helpful. However, regular brushing remains the most directly effective way to reduce the amount of fur your cat ingests in the first place.

In short

Occasional hairballs are a normal part of life with a cat, especially a longhaired one, and usually nothing to worry about. But frequent hairballs, unproductive retching, or any accompanying symptoms like appetite loss or lethargy deserve veterinary attention rather than automatic acceptance. Regular brushing remains the simplest and most effective way to reduce how often your cat deals with them in the first place.

This article is for informational purposes only. If hairball vomiting is frequent, unproductive, or accompanied by other symptoms, contact your veterinarian.

Sources

• Cornell University College of Veterinary Medicine: A Hairy Dilemma
• VCA Animal Hospitals: Trichobezoars in Cats