When to see a vet urgently
A coughing cat needs immediate help if any of the following signs occurs:
- open-mouth breathing or clearly laboured breathing at rest
- a bluish or greyish tongue and gums
- coughing up blood
- marked weakness and difficulty getting breath
Do not wait for symptoms to persist or a particular breathing rate to be exceeded. You can find a vet near you.
Overview
Coughing is a protective reflex intended to remove mucus, dust, foreign objects or abnormal secretions from the airways. It is less common in cats than in dogs, and owners sometimes confuse it with vomiting or attempts to bring up a hairball.
Airway mucus traps inhaled particles. Secretions move towards the throat, where a cat can swallow them or cough them out. Coughing is therefore not always harmful in purpose: it can help clear the airways. The underlying inflammation or irritant still needs investigation if symptoms recur.
A cough is a forceful outward breath. With a sneeze, air exits through the nose, while coughing is typically associated with irritation of the airways below the larynx. Gagging, swallowing and rattling breathing can occur together. Distinguishing them by sound alone is not always possible at home.
Causes
The most common causes of coughing in cats include:
- Respiratory infections: viral infections such as calicivirus and herpesvirus, and bacterial infections such as bordetellosis and mycoplasmosis.
- Asthma and allergic reactions.
- Lung and bronchial tumours and foreign objects, such as grass blades; feline heart disease appears more as breathlessness than coughing.
- Parasites, such as lungworms and heartworm.
- Tumours of the respiratory tract or mediastinum.
- Irritation from dust, smoke and aerosols.
- Injuries and foreign objects in the airways.
An upper respiratory infection often involves nasal or eye discharge and sneezing. A lower respiratory infection may cause coughing, reduced appetite and faster or more difficult breathing than usual. Symptom location and general condition help select investigations, but do not identify the virus or bacterium on their own.
Lungworm infection can resemble asthma. Some worms are acquired through slugs, snails or prey animals that have eaten them, so hunting is part of the history. Certain lungworm species can cause severe illness, particularly in small kittens. Ordinary worm treatment alone does not establish that lung parasites have definitely been ruled out.
Risk factors
Coughing is more common in cats that:
- live in multi-cat homes or shelters, where infections occur
- are prone to allergies and asthma
- are overweight and inactive, which worsens breathlessness
- are older, with chronic bronchitis or tumours
- go outdoors and encounter parasites and infections
There is limited information on general coughing risk factors in cats; risks vary with the underlying disease. These factors do not mean every cat in a group has the same cause of coughing. Coughing itself is also not an infectious disease. Shared infection exposure and a shared indoor air irritant, for example, can both explain symptoms in several cats, but treatment and infection control differ.
Symptoms
The nature of a cough can vary, helping diagnosis:
- A dry cough in bouts, associated with asthma or allergies.
- A wet, productive cough, associated with infections or bronchitis.
- Coughing up blood, associated with tumours, injuries or severe infections.
- Coughing bouts with the neck stretched out and body close to the floor, often mistaken for an attempt to vomit a hairball; this is typically the cough of asthma or bronchitis.
Cough characteristics provide clues, but this list cannot reliably distinguish asthma from infection or a tumour. The same disease can cause different coughs at different stages. No mucus on the floor does not guarantee there are no airway secretions, as a cat may swallow them. Visible blood needs prompt assessment.
Additional signs include sneezing, breathlessness, wheezing, apathy and reduced appetite.
Strong coughing can end in gagging and sometimes bring up stomach contents. Seeing vomit at the end of an episode therefore does not mean it did not begin as coughing. Record an episode safely if possible and note which movement came first.
At the appointment, report when symptoms began, their frequency and duration, and whether they occur at rest or during activity. Also mention weight loss, appetite changes, nasal discharge, outdoor access, travel and new household products. Symptom-free days between episodes are useful information but do not, on their own, show the cause has gone.
Complications and consequences
Persistent coughing can lead to:
- Damage to airway mucous membranes.
- Chronic bronchitis or asthma.
- Weakness and weight loss.
- Serious cardiovascular and respiratory complications.
Often, however, cause and effect run the other way: asthma or chronic bronchitis causes persistent coughing, rather than coughing itself proving these diseases are developing. Ongoing inflammation can damage the airways. The severity of consequences depends on the underlying disease and respiratory function, rather than only how many days a cat has coughed.
Diagnosis at the vet
Investigations used to establish the cause include:
- Clinical examination and listening to the chest.
- Chest X-rays.
- Heart ultrasound, or echocardiography, if a cardiac cause is suspected.
- Blood tests and serology for infections.
- Bronchoscopy where necessary.
- Parasite tests.
The history also covers previous medication and response. X-rays look for airway and lung tissue changes and findings consistent with a tumour or foreign object, for example. Cardiac investigations are performed according to findings, even though coughing is rarely a typical sign of feline heart disease.
During bronchoscopy, a small camera is used to inspect the airways. A lavage sample can assess inflammatory cells and possible microbes. Some investigations require sedation or anaesthesia. If breathing is difficult, assessment of oxygen supply and general condition takes priority over extensive further investigations.
Lungworm testing often uses the Baermann method, in which larvae are collected from faeces. One negative sample does not always rule out infection: larvae are not yet shed early in infection, and shedding may be irregular. Ask for instructions appropriate to the specific test when collecting samples and arranging any additional investigations.
Treatment and follow-up
Treatment is chosen according to the cause. A bacterial infection may need an antibiotic, a parasitic infection an appropriate antiparasitic, and inflammatory bronchial disease long-term inflammation control. A foreign object or tumour needs its own investigation and treatment plan. Temporary relief of coughing does not establish whether the underlying disease has been treated.
The need for a cough suppressant is not determined by how disturbing the sound is. Suppressing a cough that removes secretions can hinder airway clearance, whereas symptom-relieving medicine may be useful for some dry coughs at your vet's discretion. Do not give human products or medicine previously prescribed for another animal on your own initiative.
At home, monitor eating, energy and ease of breathing as well as coughing episodes. Breathing can sometimes worsen even after lungworm treatment because of inflammation caused by dying parasites. Agree monitoring instructions beforehand and seek help immediately for breathing difficulty. It is not a sign to continue or change medication without reassessment.
When to see a vet
- Your cat breathes with its mouth open or with difficulty, or the gums and tongue are bluish.
- Breathing exceeds 40 breaths per minute at rest or during sleep.
- There is coughing up blood, a high fever or failure to eat.
- Coughing bouts recur for several days in a row or coughing lasts over 2 weeks.
More than 2 weeks or the breathing rate listed are not waiting thresholds: repeated, severe coughing or coughing affecting general wellbeing is investigated earlier. Breathing can be laboured at a lower rate too. Emergency assessment is based on your cat's whole situation, rather than one reading.
Even if coughing is infrequent and your cat is otherwise healthy, take it to a vet within the next few days: coughing in cats is almost always a sign of disease, rather than an ordinary “cold”.
A single cough that passes quickly in an otherwise entirely well cat does not necessarily require emergency care. Contact a vet if it recurs, intensifies or accompanies other changes. Do not treat repeated coughing at home on the assumption that it is a common cold.
Prevention
To reduce the risk of coughing:
- Keep vaccinations against respiratory infections up to date.
- Follow parasite control plans.
- Avoid tobacco smoke, dust and chemicals.
- Monitor weight and exercise.
- Arrange regular heart checks for older cats.
Vaccines reduce the severity of particular respiratory infections, but do not prevent every infection or other cause of coughing. Tell the clinic about new respiratory signs in advance, particularly if several household cats have symptoms. This allows the visit to be arranged to reduce exposure of other animals.
Parasite control planning considers outdoor access, hunting and travel, and which parasites the chosen product targets. Avoid strongly scented cleaning sprays near your cat. A smoke-free, low-dust environment reduces irritation but does not replace investigation of repeated coughing that has already begun.
What it means for owners
Coughing in cats always needs attention. If it recurs or is accompanied by apathy, breathlessness or discharge, it may indicate serious disease. Remember that coughing is a symptom: treatment should target the underlying disease that caused it, rather than the cough alone.
Frequently asked questions
Can a cat's cough look like bringing up a hairball?
Yes. A cat may crouch, stretch its neck and gag while coughing. The episode can also end in vomiting. Do not dismiss repeated symptoms as a hairball problem without veterinary assessment.
Does worm treatment rule out lungworms?
Not on its own. Different products target different parasites, and detecting infection may require a specific faecal examination or other tests. Tell your vet exactly which product was used and when so further investigations can be planned.
Does a coughing cat always need an antibiotic?
No. Asthma, a parasite, a foreign object or irritation may be responsible, and an antibiotic is not a universal treatment for these. Medicine needs are determined by investigations and your cat's condition. Do not stop prescribed treatment yourself when symptoms improve.
This article is for general information only and is not a guide to treatment. If you notice the first signs of illness, contact your vet.
Paw4care editorial team
Sources
- Coughing in Cats, VCA, accessed 2026-11-03.
- Introduction to Lung and Airway Disorders of Cats, Merck Veterinary Manual, accessed 2026-11-03.
- Guideline for Lungworm disease, European Advisory Board on Cat Diseases, accessed 2026-11-03.
- Respiratory Infections, Cornell University, accessed 2026-11-03.
- Coughing in Pets, Schwarzman Animal Medical Centre, accessed 2026-11-03.
- Clinical Signs of Respiratory Disease in Animals, Merck Veterinary Manual, accessed 2026-11-03.