Finding vomit on the carpet may feel like a familiar part of living with a cat, but frequent vomiting should never be dismissed as “just something cats do.”
An occasional episode may involve swallowed hair or a temporary digestive upset. Repeated vomiting, however, can signal kidney disease, hyperthyroidism, intestinal inflammation, a swallowed object, poisoning, or another condition that needs treatment.
At Livermore Family Pet Hospital, we help identify the cause, relieve nausea and discomfort, and develop a treatment plan for your feline family member.
Seek immediate veterinary care if your cat may have swallowed a toxin or foreign object, cannot keep water down, has difficulty breathing, collapses, or strains to urinate with little or no urine.
Common Reasons Cats Vomit
Kidney Disease
Kidney disease is an important cause of nausea and vomiting, particularly in older cats. As kidney function declines, waste products can accumulate, and problems with hydration and electrolyte balance can develop.
Other signs may include increased thirst, larger urine clumps in the litter box, reduced appetite, weight loss, and lethargy. Early kidney disease may cause few obvious symptoms.
Kidney injury can also develop suddenly following toxin exposure, infection, or urinary tract problems. Bloodwork and urinalysis help us evaluate kidney function and determine appropriate care.
Hyperthyroidism
Hyperthyroidism occurs when the thyroid gland produces too much thyroid hormone. It is especially common in middle-aged and older cats.
An affected cat may lose weight despite eating enthusiastically. Other signs include vomiting, diarrhea, increased thirst and urination, restlessness, vocalization, and an unkempt coat.
These changes should not be dismissed as normal aging. Thyroid blood testing helps us investigate this treatable condition.
Gastrointestinal Foreign Bodies
Cats may swallow string, ribbon, dental floss, yarn, hair ties, rubber bands, toy pieces, or other objects. These materials can irritate the digestive tract or cause an obstruction.
String-like objects are particularly dangerous. One end may become anchored under the tongue or in the stomach while the intestines gather along the remaining length. This can damage or tear the intestinal wall.
Signs may include vomiting, appetite loss, hiding, abdominal discomfort, and lethargy. Some cats with an obstruction still pass stool.
If string is visible from your cat’s mouth or anus, do not pull it. Seek veterinary care immediately. Pulling may cause further internal injury.
Toxins and Poisoning
Cats can be poisoned by eating a substance or grooming it from their fur. Hazards include human medications, antifreeze, certain plants, pesticides, and household chemicals. Products safe for another species are not necessarily safe for cats.
True lilies and daylilies are especially dangerous. Chewing a leaf or petal, licking pollen from the coat, or drinking vase water can cause life-threatening kidney failure. Suspected exposure requires immediate veterinary attention, even if your cat seems normal.
Contact Livermore Family Pet Hospital, an emergency veterinarian, or ASPCA Poison Control at 888-426-4435. A consultation fee may apply. Bring the packaging or a photograph of the suspected substance. Never give hydrogen peroxide or attempt to induce vomiting at home in a cat.
Gastritis, Gastroenteritis, and Dietary Problems
Gastritis means inflammation of the stomach. Gastroenteritis involves the stomach and intestines and may cause both vomiting and diarrhea.
Possible causes include:
- Abrupt food changes
- Food intolerance or sensitivity
- Spoiled food or inappropriate treats
- Parasites
- Certain infections
- Irritating substances or medication effects
Repeated vomiting should not automatically be attributed to a “sensitive stomach.” Testing may be needed to identify the cause and rule out more serious conditions.
Hairballs and Excessive Grooming
Cats swallow hair while grooming, and most passes through the digestive tract. An occasional hairball can occur, but frequent hairballs, repeated retching, or vomiting food between hairball episodes warrant attention.
Excessive grooming may increase the amount of swallowed hair. Recurrent episodes can also prompt an investigation for underlying skin or digestive problems.
Do not assume repeated hacking is an attempt to bring up a hairball. Coughing from respiratory disease can look similar.
Chronic Intestinal Disease and Cancer
Chronic inflammation of the digestive tract, including inflammatory bowel disease, can cause recurring vomiting, appetite changes, diarrhea, or weight loss. Intestinal lymphoma and other tumors can produce similar signs.
A cat may seem relatively normal between episodes. A pattern of vomiting over weeks or months still deserves an examination. Bloodwork, ultrasound, and sometimes tissue samples help distinguish among possible causes.
Pancreatitis, Liver Disease, and Diabetes
Vomiting can originate from disease outside the stomach.
Pancreatitis, or inflammation of the pancreas, often causes subtle signs in cats. Reduced appetite and lethargy may be more noticeable than vomiting.
Liver and bile duct disease can also cause vomiting, sometimes accompanied by yellow discoloration of the eyes, gums, or skin. Diabetes can lead to serious metabolic complications, including diabetic ketoacidosis, that require urgent treatment. Blood and urine testing help investigate these possibilities.
Constipation and Urinary Obstruction
Severe constipation can cause nausea, reduced appetite, and vomiting. However, a cat straining in the litter box may be trying to urinate rather than pass stool.
A urinary blockage is a life-threatening emergency, especially in male cats. Repeated trips to the litter box with little or no urine require immediate care. Do not wait for vomiting or weakness to develop.
Stress and Anxiety
Changes in routine, moving, conflict between cats, unfamiliar visitors, or travel can affect appetite and digestive function. Stress may contribute to gastrointestinal upset, but illness must be considered before labeling vomiting as anxiety.
Tell us about any recent changes at home. Our Fear Free-trained team can help address your cat’s emotional needs while evaluating possible medical causes.
Is It Vomiting, Regurgitation, or Coughing?
Vomiting usually involves nausea, retching, and abdominal contractions. Regurgitation is more passive: food or fluid comes back up with little effort, often soon after eating.
Coughing may involve crouching and extending the neck without producing food or hair. A short video can help us distinguish these events. Breathing difficulty or open-mouth breathing requires emergency attention.
When Should I Call the Veterinarian?
Seek immediate care for:
- Repeated vomiting or inability to keep water down
- Suspected toxin or foreign-object ingestion
- Blood or coffee-ground-like material in the vomit
- Severe abdominal pain or repeated unsuccessful retching
- Collapse, marked weakness, or breathing difficulty
- Straining to urinate with little or no urine
Contact Livermore Family Pet Hospital promptly for recurring vomiting, appetite loss, weight loss, diarrhea, hiding, or changes in thirst and urination. Kittens, seniors, and cats with existing medical conditions need an especially early call.
Do not wait several days when a cat stops eating. Contact us the same day if vomiting is accompanied by food refusal. Prolonged inadequate intake can contribute to hepatic lipidosis, a serious liver condition, particularly in overweight cats.
What Can I Do at Home?
After one isolated episode in an otherwise comfortable, alert adult cat, close observation may be reasonable if no dangerous exposure is suspected.
Record the timing, appearance, and number of episodes. Watch appetite, water intake, energy, and litter-box output. Take a photograph or video if possible.
Keep fresh water available, but do not force food or water. Ask our team for feeding guidance rather than automatically fasting your cat. Avoid human medications, leftover prescriptions, and unapproved hairball remedies.
If vomiting repeats or your cat seems unwell, call us.
How Can Livermore Family Pet Hospital Help?
Our team will review your cat’s history and perform an examination. Depending on the findings, we may recommend bloodwork, urinalysis, thyroid testing, fecal testing, X-rays, ultrasound, or additional diagnostics.
Treatment may include nausea relief, fluid support, pain control, nutritional support, or treatment of an underlying disease. A swallowed object may require endoscopy or surgery.
Contact Livermore Family Pet Hospital to discuss your cat’s vomiting. If emergency signs are present and we are closed or cannot see your cat promptly, go to the nearest emergency veterinary hospital.
Frequently Asked Questions
Is it normal for cats to throw up regularly?
No. An occasional isolated episode can happen, but recurring vomiting should be investigated, even if your cat seems fine afterward.
How do I know whether it is just a hairball?
Finding hair in the vomit does not prove that hair is the only problem. Frequent episodes, appetite changes, weight loss, or vomiting without hair deserve an examination.
Why is my older cat vomiting and losing weight despite eating well?
Hyperthyroidism is one possibility, but intestinal disease and other conditions can cause similar changes. Contact us for an examination and appropriate testing.
Can kidney disease cause vomiting?
Yes. Declining kidney function can lead to nausea, vomiting, appetite loss, and dehydration. Increased thirst or larger litter-box urine clumps may be additional clues.
Why is my cat throwing up yellow liquid or white foam?
Yellow fluid may contain bile, while white foam may contain saliva and stomach fluid. Either can occur after the stomach empties, but appearance alone cannot identify the cause. Repeated episodes need evaluation.
Can stress make my cat vomit?
Stress can contribute to digestive upset and changes in eating. However, do not assume stress is the explanation without considering medical causes, particularly when vomiting recurs.
My cat throws up right after eating. Are they eating too fast?
Eating rapidly may contribute, but passive regurgitation and true vomiting have different possible causes. A video can help us assess the event. Smaller meals or a suitable slow feeder may help some cats after medical concerns are considered.
Can a cat have an intestinal blockage and still pass stool?
Yes. Stool beyond an obstruction may still pass, and a partial blockage may allow some material through. Normal-looking stool does not exclude a blockage.
What should I do if I see string coming from my cat?
Do not pull string from the mouth or anus. Prevent further chewing if you can do so safely and seek immediate veterinary care.
What if my cat touched a lily but did not eat it?
Pollen on the coat can be swallowed during grooming. Contact a veterinarian or poison-control specialist immediately after possible true-lily or daylily exposure. Do not wait for vomiting to begin.
Should I withhold food for 24 hours?
Do not automatically fast a vomiting cat. Feeding advice depends on age, health, symptoms, and the suspected cause. Call our team, especially if your cat is already refusing food.
Can I give my cat human stomach medication?
Only if our veterinarian specifically directs you to use that product and dose. Some human medications are highly toxic to cats. Never use hydrogen peroxide to make a cat vomit.
Why does the veterinarian ask whether my cat is urinating?
A urinary blockage can cause vomiting and rapidly become life-threatening. Repeated straining with little or no urine is an emergency, even if it looks like constipation.
What should I bring to the appointment?
Bring photos or video, a list of medications and supplements, and details about food changes, appetite, weight, and litter-box habits. Bring suspected toxin packaging if available. Do not delay urgent care to collect these items.
Who should I contact about recurring vomiting?
Contact Livermore Family Pet Hospital. Our team can help determine how urgently your cat needs an examination and develop a plan to address both the vomiting and its cause.