Why Is My Cat Throwing up Clear Liquid?

A cat’s vomiting (throwing up) is the active motion of ejecting the contents of its stomach and small intestines through its mouth. This is in contrast to regurgitation, a passive motion in which no force is required to evacuate material via the cat’s mouth (regurgitation).

When it comes to cats, it can be difficult to distinguish between retching/vomiting, regurgitation, and coughing, among other things. These are all extremely distinct from one another and have various possible causes, so it is vital to make an effort to distinguish between them.

A cat vomiting clear liquid is not something that happens all of the time. This indicates that the kitty suffers from a medical condition that requires immediate care and medical treatment. We recommend that you talk with your veterinary doctor to determine the root cause of the problem.

Most appropriate course of action is to record a video, if feasible, and show it to your veterinarian. They can help you in determining whether your cat is vomiting and, if so, what is causing the vomiting.

Why is My Cat Throwing up (Vomiting) Clear Liquid?

The reason for your cat’s vomiting will be determined by a series of questions asked by your veterinarian. These are some examples:

•        Have you recently changed the food that your cat eats?

•        Have you started using any prescription or over-the-counter medications? If so, please explain.

•        What kind of diet does your cat follow, including all treats?

•        Is your cat an indoor or an outdoor cat?

•        Is it possible that you have other cats in the house, and if so, are any of them vomiting as well?

•        Your cat’s vomiting frequency and the appearance of the vomit are also important questions to ask.

•        Is your cat still consuming food?

•        Is your cat experiencing any additional symptoms, such as diarrhea and loss of weight?

•        Has your cat been vomiting for a lengthy period?

There are various possible reasons for cat vomiting, and the answers to these questions can assist your veterinarian in determining the most appropriate treatment. Cats who vomit can be classified into two groups based on their vomiting: gastrointestinal causes and non-gastrointestinal causes.

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Gastrointestinal Tract Can Cause Cat to Throw up Clear Liquid

Clear liquid vomit indicates that the cat is bringing up fluid from the digestive tract, which is frequently stomach juice, and should be avoided. According to the veterinarian, when a cat vomits immediately after drinking a significant amount of water, she may vomit clear liquid as well, which is usually the water they just consumed. There are various reasons for cats to vomit, and many, if not the majority, of these, can result in puddles of clear liquid. Some of the most frequently encountered are as follows:

•        Indiscretion in one’s eating habits

•        Foreign entities

•        Parasites

•        Hypersensitivity to certain foods

•        Crohn’s disease and ulcerative colitis

•        Constipation

•        Cancer

•        Ulceration

•        Ingestion of toxic substances (ethylene glycol, chocolate, pesticides, etc.)

Non-Gastrointestinal Issues Can cause Cat to Throw up Clear Liquid

•        Pancreatitis

•        Kidney disease

•        Diabetes mellitus

•        Liver disease

•        Feline infectious peritonitis

•        Cancer

•        Diseases of the nervous system

What Is the Appearance of Your Cat’s Vomit?

It is critical to understand your cat’s vomit appearance because different conditions might cause the vomit to have a more distinct appearance than others. Here are some examples of vomit color and consistency and the likely causes for each of these conditions.


Cats will vomit bile if they do not have enough food in their stomach. This can happen if you only feed your cat in the morning and they go 24 hours without food, or it can happen if your cat is anorexic and you only provide him or her in the morning. Food causes the gall bladder to contract, bile can back up into the small intestines and stomach when the gall bladder does not contract properly.


It is possible to detect blood in the urine when your cat has ulcers, and if your cat vomits multiple times in a row, this can cause irritation of the stomach lining and the esophagus due to the increased acid. Blood may also be present if there is an irregularity in the clotting process due to certain disorders and certain poisons (rat poisoning, for example).

White Foam

White foam in cat vomit is frequently observed because the lining of the stomach or small intestines has become irritated, which can be caused by various factors.

Drinking-Water or a Clear Liquid

If the cat is vomiting clear liquid, it could be due to the fluid contents of the stomach, or it could be because your cat has consumed too much liquid. Cats may consume excessive amounts of water due to various conditions, including diabetes mellitus and kidney damage.


Roundworms are the mainly common type of worm that can be found in cat vomit. If your cat vomits up a worm, you must take him or her to your veterinarian so that he or she might be treated appropriately for the problem.


Cats who consume too much or too quickly may vomit their food, which often occurs in a tubular shape. If a person becomes queasy soon after eating, if there is a foreign body preventing the food from passing into their small intestines, or if they have an allergy to a meal, they may vomit it up.


Cats, particularly those overgroom or with long hair, may occasionally vomit hairballs, but this is rare.

Brown Liquid

Ulcers, foreign bodies, and even hairballs in the intestines are signs of digested blood lower down the intestinal tract, which can be seen with ulcers, foreign bodies, and even hairballs.

Green Color Vomit

Green vomit from your cat usually indicates that the food or substance has been brought up from the small intestine. The combination of vomitus and bile has the potential to turn the color green.


If your cat is regurgitating rather than vomiting, mucus is most likely to be present. If you notice mucus, it is critical to establish whether your cat is genuinely vomiting or if they are regurgitating the food they ate.

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What Is Causing My Cat to Vomit Clear Liquid?

When you notice your kitty companion throwing up clear liquid, it’s natural to be concerned. This occurs because human vomiting is a symptom of the disease.

However, furry pals throwing up clear liquid is a somewhat normal occurrence, and there is no reason to be concerned about it whatsoever.

If the behavior is repeated regularly, it is an indication that something is wrong and that the cat requires emergency medical attention from a skilled veterinarian.

Consider several factors that could cause your cat to vomit clear liquid in the future:

1.     Excessive Accumulation of Hairballs in the Intestines and Stomach

Cats enjoy grooming themselves and, in the process, wind up swallowing the fur, which eventually thickens to form a hairball. To get rid of the hairballs, their body will respond by prompting vomiting to expel them.

One explanation for the clear liquid is that it is caused by some of the gastric fluids and pressure utilized to expel out hairballs.

We recommend that you groom your feline companion and feed her more cat chow that is high in fiber to aid in the treatment of the condition.

If your furball is vomiting clear liquid and releasing hairballs regularly, you should consult your veterinarian because this could indicate sickness.

2.     Constipation and Diarrhea

Cat vomiting can be caused by a variety of factors, the most common of which is stomach discomfort. The disturbance can be caused by a variety of factors that are either typical or severe.

It is possible to cause feline vomiting clear liquid by overindulging in food or suddenly switching cat food brands. This is regarded to be typical and can be dealt with relatively quickly.

The stomach of your furry buddy will experience acidic irritation if you starve her, which will result in her vomiting clear liquid. We propose that you feed your furball daily according to a routine.

The last thing to mention is that gastroenteritis and irritable bowel syndrome are two of the most severe gastrointestinal disorders resulting in clear liquid vomit. You will be expected to contact your veterinarian for prescriptions and nutritional advice regarding your pet’s food.

3.     The Presence of a Parasite in the Stomach

Cats are susceptible to parasite infestations, such as tapeworms and roundworms, which can be fatal. If you haven’t dewormed your feline companion in a couple of years, you can anticipate clear liquid vomit to accompany you on your journey.

It is recommended to deworm your kittens and adult cats at least twice a year to keep them healthy. This will save you from a hellish amount of filthy chores such as cleaning cat vomit from your home.

When you detect a change in the behavior of your furry pet, always inspect the feces to determine whether there are any worms present. This is the most reliable method of determining whether or not your cat is infected with parasites.

4.     Hyperthyroidism

Senior cats are particularly susceptible to thyroid problems due to an overactive thyroid. Cat vomiting and weight loss are typical symptoms of the condition.

The kitty suffering from the sickness will typically eat a lot, drink a lot of water, have diarrhea, and meow excessively.

If you suspect that your feline companion is suffering from the disease, you should see your veterinarian for a blood test. This will aid in determining the number of thyroid hormones in the blood.

In order to alleviate the symptoms of the sickness, the feline will be administered medication daily by the veterinarian.

5.     Insufficiency of the Kidneys

This is another issue that frequently arises in the case of elderly cats. Chronic kidney illness is characterized by increased water intake, a loss of appetite, dehydration, and, on rare occasions, foamy white vomit (nephrotic syndrome).

You should take the kitty to the veterinarian for a comprehensive diagnostic and administer daily drugs to suppress the symptoms causing the feline’s numerous problems.

6.     Cats with Diabetes

Insulin resistance in cats is becoming yet another major setback for feline society. The majority of these felines who suffer from the illness typically have increased water intake and urine.

Another symptom is chronic vomiting, leading to weight gain, poor smell, and changing skin conditions.

It is anticipated that the furry buddy will be subjected to insulin therapy and a change in food. Cats with diabetes are typically required to follow a special diet.

7.     Hepatic Insufficiency

A cat suffering from liver disease will exhibit a variety of symptoms, including vomiting, yellowing skin or sclera, and loss of appetite, among others.

Unfortunately, liver illness in cats cannot be cured. Fortunately, the symptoms can be readily controlled with medicine. You will be needed to work with your veterinarian to develop a treatment plan.

How Veterinarians Handle Cat Vomiting

In order to make a distinction between acute vomiting and chronic vomiting, it is necessary to recognize the difference. Chronic vomiting is described as a cat that vomits more than once a week or who has been vomiting now and then for more than three months on a continuous or intermittent basis.

Treatment of Acute Vomiting in Cats

The first step in correctly treating your cat’s vomiting is determining the underlying cause of the condition. First and foremost, your veterinarian will perform non-invasive diagnostic procedures. This includes the following:

•        To screen for disorders including renal disease and diabetes, a chemical panel and CBC (general blood tests) are performed.

•        To rule out larger tumors or foreign things that could be creating an obstruction, abdominal radiographs are taken.

If the tests results are normal and your cat is vomiting violently, your veterinarian will likely offer supportive treatment with anti-nausea drugs to help relieve the vomiting.

Specific high-fiber food for cats with hairballs and medicine to aid the passage of hairballs can be given to them to help them avoid vomiting.

Taking Care of a Cat Who Is Constantly Throwing up (Chronic Vomiting in Cats)

Additional tests may be necessary if your cat continues to vomit or has a history of persistent vomiting.

•        Gastrointestinal panel: This will test the pancreas enzymes to rule out a severe medical condition of pancreatitis. It will also examine cobalamin and folate levels to evaluate whether or not there is evidence of malabsorption in the small intestine.

•        In contrast to x-rays, abdominal ultrasonography is extremely sensitive in detecting smaller foreign objects that x-rays are incapable of detecting. This ultrasound examines the pancreas and aids in the measurement of the gastrointestinal tract’s wall thickness. It will also aid in eliminating any swollen lymph nodes that may be present in the presence of cancer.

•        Chest x-rays: If it is unclear whether your cat is vomiting, regurgitating, or coughing, your veterinarian may offer this procedure. In addition, chest x-rays are indicated in elderly cats to rule out the possibility of cancer.

In some instances, the diagnostic tests return negative results or fail to establish a definitive diagnosis. If the disease is present at the cellular level of the small intestine, this can be observed.

Following that, biopsies of your cat’s gastrointestinal system would be taken to discriminate between inflammatory bowel illness, food hypersensitivity, and gastrointestinal lymphoma, among other things. Your veterinarian may advise you to attempt a new diet before taking biopsies if a food allergy causes the problem.

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