# Cat Throwing Up but Not Pooping or Drinking: What It Means A cat throwing up not pooping is a pattern that deserves a call to your veterinarian, because vomiting plus a lack of stool can point to an intestinal blockage or serious dehydration. Either problem can worsen quickly in cats, sometimes within hours. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Vomiting and no stool together are more concerning than either sign alone, because a blockage can stop food and fluid from moving through the gut. - A cat who vomits and also stops drinking can become dehydrated fast, and dehydration makes vomiting worse. - Do not give human anti-nausea drugs, pain relievers, or laxatives. Many are toxic to cats, and the dose depends on your cat's weight and health. - Withhold food only if your veterinarian tells you to. They may advise a 24 to 48 hour fast to rest the digestive system [1]. - Call your veterinarian today if your cat vomits more than once or twice, has not passed stool in 24 hours, or refuses water. Go to an emergency clinic now if vomiting is repeated, forceful, or paired with a painful belly. ## What This Sign Looks Like and What Is Normal Vomiting in cats is the forceful ejection of stomach and upper small intestine contents through the mouth. It is usually preceded by drooling, repeated swallowing, retching, and strong contractions of the belly muscles and diaphragm [2]. That effort is what separates vomiting from regurgitation, which is passive and produces undigested food that may keep the tube shape of the esophagus [2]. Normal for a cat is occasional, isolated vomiting, such as a single hairball now and then. Repeated vomiting is not normal, and frequent hairballs or repeated vomiting should prompt a veterinary visit, because something more serious than a hairball may be the cause [2]. Stool habits matter too. Most adult cats pass stool roughly once a day, though some go every other day. If your cat has vomited several times and has not produced stool in a day or more, the two signs together change the picture. The gut may be blocked, inflamed, or simply too empty and too dry to move contents along. ## Main Causes of Vomiting With No Stool ### Intestinal Obstruction A mechanical blockage is the top concern when a cat vomits and cannot poop. Foreign objects, tumors, and severe intestinal inflammation can all narrow or block the gut. In one reported case, a 6-month-old cat was seen for vomiting, constipation, weight loss, and jaundice, and imaging found an 80 mm segment of thickened descending colon causing mechanical obstruction that required surgery [3]. That case involved a rare cause, but it shows how a physical blockage produces exactly this combination of vomiting and no stool. ### Constipation and Dehydration When a cat does not drink enough, stool becomes hard and dry, and the colon struggles to move it. Vomiting pulls more fluid out of the body, so a vomiting cat who also avoids water can spiral into constipation and dehydration at the same time. This is why a cat throwing up not drinking water needs attention quickly. ### Inflammation of the Stomach and Intestines Inflammation in the digestive tract can cause vomiting, reduced appetite, and changes in stool. Treatment depends on the cause, and your veterinarian may recommend withholding food for 24 to 48 hours to rest the digestive system, then adding soluble fiber to the diet and possibly trying a protein source your cat has not eaten before, such as lamb, venison, or rabbit [1]. Antibiotics, anti-inflammatory medication, or medication to thicken the stool may also be used short term [1]. ### Other Body-Wide Diseases Vomiting has many causes beyond the gut. These include kidney or liver failure, pancreatitis, nervous system disorders, poisons, insect stings or snake bites, internal parasites including heartworm disease, infections, inflammation, drugs, swallowed foreign objects, food allergy, and tumors [2]. Some of these conditions also slow the gut or reduce appetite and water intake, which explains the missing stool. A pancreatic tumor is one example. A 12-year-old cat was presented with a 3-week history of anorexia, lethargy, abdominal pain, and intermittent vomiting, and imaging found a mass involving the pancreas [4]. Vomiting that lasts weeks, especially with weight loss or belly pain, always needs a workup. ### Cause Table | Cause | Typical clues | How urgent | |---|---|---| | Intestinal obstruction | Repeated vomiting, no stool, belly pain, may worsen fast | Emergency | | Constipation with dehydration | Hard or absent stool, tacky gums, low water intake | Same day | | Gut inflammation | Vomiting, soft or absent stool, reduced appetite | Same day to 48 hours | | Kidney, liver, or pancreatic disease | Long-term vomiting, weight loss, lethargy, jaundice | Same day | | Poison or toxin exposure | Sudden vomiting, drooling, possible tremors | Emergency | | Hairballs or mild upset | Occasional vomiting, cat still eating and drinking | Routine visit if it repeats | ## Red Flags That Make It an Emergency Go to an emergency clinic now if you see any of these: - Repeated vomiting in a single day, or vomiting that will not stop. - A hard, swollen, or painful belly when you touch it gently. - Unproductive retching, where your cat heaves but brings nothing up. This can resemble the pattern in [Cat Dry Heaving But No Vomit](/knowledge/veterinary-medicine/symptom-guides/cat-dry-heaving-but-no-vomit). - No stool for more than 24 to 48 hours along with vomiting. - Refusing all water for more than 12 hours, or signs of dehydration such as tacky gums, skin that stays tented when gently pinched, or sunken eyes. - Blood in the vomit or stool, or black tarry stool. - Weakness, wobbling, collapse, or breathing that looks labored. - Known or suspected access to string, toys, bones, human medication, plants, or antifreeze. If your cat is vomiting and also has diarrhea and has stopped eating, that combination can drain fluid and electrolytes quickly. A cat who is vomiting, not eating, and passing loose stool should be seen the same day, because dehydration can develop within hours in a small body. ## Safe Things You Can Do at Home While Waiting Home care is about comfort and monitoring, not treatment. Do these while you arrange a veterinary visit. - Remove all food and water for the short trip only if your veterinarian instructs it. Otherwise, offer small amounts of water in a shallow dish so you can track how much your cat drinks. - Keep your cat indoors and away from garbage, string, rubber bands, and small toys. - Write down the time of each vomit, what it looked like, and whether food, fluid, hair, or foam came up. Note the last time your cat passed stool and urinated. - Check hydration at home. Gently lift the skin between the shoulder blades. If it stays up instead of springing back, call your veterinarian. - Do not give human medications such as ibuprofen, acetaminophen, or anti-nausea pills. Some are highly toxic to cats, and any drug dose must be calculated by your veterinarian based on your cat's weight and health. - Do not force food or water by syringe unless your veterinarian tells you to. It can cause choking or make vomiting worse. - If your cat vomits undigested food that looks like whole kibble, that pattern has its own guide at [Cat Throwing Up Food Undigested](/knowledge/veterinary-medicine/nutrition/cat-throwing-up-food-undigested). If your cat is vomiting and not drinking, small sips of plain water are fine to offer, but do not push large volumes. A cat who cannot keep water down needs veterinary fluids, not home forcing. ## What Your Veterinarian Will Check and Test Your veterinarian will start with a full history, including when the vomiting began, how often it happens, what it looks like, the last stool, and any possible exposure to foreign objects or toxins. They will check your cat's hydration, weight, gum color, belly feel, and temperature. Testing often includes blood work to look at kidney and liver values, electrolytes, and blood cell counts, plus imaging such as X-rays or ultrasound to look for a blockage, mass, or thickened bowel. In the reported obstruction case, radiography, ultrasonography, and contrast-enhanced computed tomography were all used to identify the blocked colon before surgery [3]. Treatment depends on the cause. Options may include intravenous fluids for dehydration, anti-nausea medication, pain control, a prescription diet, fiber, or surgery if there is a physical blockage [1]. If your cat needs anti-nausea medication, your veterinarian will choose the drug and dose. One review of antiemetic strategies in cats found that maropitant reduced the risk of vomiting compared with control in controlled studies, with emesis in 11 of 141 treated cats versus 70 of 152 controls [5]. That is a research finding about a specific drug in specific settings, and it does not mean every vomiting cat needs it. Your veterinarian decides. If your cat swallowed something and is stable, your veterinarian may discuss inducing vomiting. One study of transmucosal detomidine gel in cats seen for dietary indiscretion found emesis occurred in 28 of 57 cats, about 49 percent, with a median time to vomiting of 11 minutes [6]. This is a procedure done in a clinic with monitoring, never at home. ## Prevention and Monitoring Prevention focuses on the two problems behind most of these cases: swallowed objects and poor water intake. - Cat-proof your home. Put string, thread, dental floss, hair ties, rubber bands, plastic wrappers, and small toys out of reach. String is a common cause of intestinal blockage in cats. - Feed measured meals on a schedule so you notice right away when your cat skips food. - Encourage drinking with a water fountain, multiple water bowls, and wet food. Cats often drink more when water is fresh and moving. - Brush your cat regularly to reduce hairball swallowing, and talk to your veterinarian if hairballs are frequent, since repeated vomiting deserves a check [2]. - Keep up parasite prevention and routine wellness visits, because internal parasites and organ disease can both cause vomiting [2]. - Track litter box habits. Knowing your cat's normal stool schedule helps you spot a missed day early. If your cat has had one episode of vomiting and is otherwise bright, eating, and passing stool, watch closely for 24 hours. If the vomiting repeats, if stool stops, or if water intake drops, call your veterinarian. A cat who vomits undigested food but acts normal still deserves monitoring, and that pattern is covered in [Cat Vomiting Undigested Food But Acting Normal](/knowledge/veterinary-medicine/nutrition/cat-vomiting-undigested-food-but-acting-normal). ## Limitations and When to Contact a Veterinarian This article cannot tell you what is wrong with your cat. Only a veterinarian who examines your cat can do that, and individual cases always need that hands-on evaluation. Call your veterinarian the same day if your cat: - Vomits two or more times in a day. - Has not passed stool in 24 hours. - Drinks noticeably less than usual. - Eats less than half of a normal meal. - Has vomited for more than 24 hours, even mildly. Go to an emergency clinic right away if your cat: - Vomits repeatedly or cannot stop. - Has a painful, swollen, or hard belly. - Retches without bringing anything up. - Shows weakness, collapse, pale gums, or trouble breathing. - May have swallowed string, a toy, a bone, or a toxin. - Has not urinated in 24 hours. If you suspect poisoning, call your veterinarian or a pet poison hotline immediately. Do not wait for symptoms to worsen. ## Frequently Asked Questions ### How long can a cat go without pooping before it is a problem? Most cats pass stool daily or every other day, so a gap longer than 48 hours with vomiting is a reason to call your veterinarian. A missed day alone may be minor, but vomiting plus no stool raises concern for a blockage or dehydration. Your veterinarian can examine your cat and decide whether imaging is needed. ### Can constipation make a cat throw up? Yes. Severe constipation and dehydration can slow the entire digestive tract and trigger vomiting. Hard, dry stool is difficult for the colon to move, and a backed-up gut can cause nausea. If your cat strains in the litter box and vomits, have them seen promptly. ### Should I force my cat to drink water? No. Never syringe water into your cat's mouth unless your veterinarian instructs it, because it can cause choking or aspiration. Offer small amounts in a shallow bowl and track intake instead. A cat who refuses water for more than 12 hours needs veterinary care, often with fluids given under the skin or into a vein. ### Is it safe to give my cat human anti-nausea medicine? No. Several human medications are toxic to cats, and the correct drug and dose depend on your cat's weight and health. Only your veterinarian should prescribe anti-nausea or pain medication for your cat. Call them before giving anything, including over-the-counter products. ### What if my cat is vomiting but still acting playful? Acting normal is a good sign, but it does not rule out a blockage or dehydration in the early stages. Keep track of vomiting episodes, water intake, and stool output for the next 24 hours. If any of those change, or if vomiting repeats, call your veterinarian. ## Related Articles - [What Does It Mean When A Cat Throws Up Undigested Food](/knowledge/veterinary-medicine/nutrition/what-does-it-mean-when-a-cat-throws-up-undigested-food) - [Cat Dry Heaving But No Vomit](/knowledge/veterinary-medicine/symptom-guides/cat-dry-heaving-but-no-vomit) - [Cat Vomiting and Not Drinking Water: Hydration Tips and Red Flags](/knowledge/veterinary-medicine/digestive-and-urinary-care/cat-vomiting-not-drinking-water) - [Cat Throwing Up Food Undigested](/knowledge/veterinary-medicine/nutrition/cat-throwing-up-food-undigested) - [Cat Vomiting Undigested Food But Acting Normal](/knowledge/veterinary-medicine/nutrition/cat-vomiting-undigested-food-but-acting-normal) - [My Cat Threw Up White Foam What Does That Mean](/knowledge/veterinary-medicine/clinical-methods/my-cat-threw-up-white-foam-what-does-that-mean) - [Cat Not Peeing or Pooping: When It's an Emergency](/knowledge/veterinary-medicine/digestive-and-urinary-care/cat-not-peeing-or-pooping) - [Cat Vomiting and Not Eating: Causes and When to Worry](/knowledge/veterinary-medicine/digestive-and-urinary-care/cat-vomiting-and-not-eating) - [Cat Throwing Up but Acting Normal: When to See a Vet](/knowledge/veterinary-medicine/digestive-and-urinary-care/cat-throwing-up-acting-normal) ## References 1. [Disorders of the Stomach and Intestines in Cats - Cat Owners](https://www.merckvetmanual.com/cat-owners/digestive-disorders-of-cats/disorders-of-the-stomach-and-intestines-in-cats). Merck Veterinary Manual. 2. [Vomiting in Cats - Cat Owners](https://www.merckvetmanual.com/cat-owners/digestive-disorders-of-cats/vomiting-in-cats). Merck Veterinary Manual. 3. [Obstructive colonic FGESF associated with feline infectious peritonitis in a cat: a case report](https://pubmed.ncbi.nlm.nih.gov/41572251/). BMC veterinary research, 2026. 4. [Primary pancreatic histiocytic sarcoma with peritoneal sarcomatosis in a cat](https://pubmed.ncbi.nlm.nih.gov/42419139/). Journal of comparative pathology, 2026. 5. [Receptor-Targeted Antiemetic Strategies in Cats: A Systematic Review and Intervention-Specific Meta-Analysis](https://pubmed.ncbi.nlm.nih.gov/42599757/). Veterinary medicine and science, 2026. 6. [Transmucosal detomidine gel induces emesis in approximately half of cats presenting for dietary indiscretion](https://pubmed.ncbi.nlm.nih.gov/41534211/). Journal of the American Veterinary Medical Association, 2026. ## Further Reading - [American Veterinary Medical Association: First Aid Tips for Pet Owners](https://www.avma.org/resources-tools/pet-owners/emergencycare/first-aid-tips-pet-owners) - [Merck Veterinary Manual: Cat Owners](https://www.merckvetmanual.com/cat-owners) - [Cornell Feline Health Center: Health Information](https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information)