# Why Are My Cat's Teeth Yellow? Causes and What to Do Yellow teeth in cats usually come from plaque and tartar buildup, which is the early stage of gum disease. Sometimes the color points to something else, like tooth resorption, injury, or a health problem elsewhere in the body. A veterinarian can tell the difference and treat the cause. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Yellow or brown staining on cat teeth most often means plaque and tartar, the buildup that leads to gum (periodontal) disease [1]. - Gum disease starts with bacteria collecting at and below the gum line, and it can destroy the tissues and bone that hold teeth in place [1]. - Periodontitis is one of the most common reasons cats lose teeth, and it becomes more common with age [2]. - A professional dental cleaning under anesthesia is the treatment for gingivitis and periodontitis, and cleanings done without anesthesia do not fix the problem below the gum line [1]. - Daily tooth brushing is the most effective way to prevent plaque from building up again [3]. ## What Yellow Teeth Mean in Cats When you look at your cat's teeth and see yellow, you are usually seeing plaque and tartar. Plaque is a sticky film of bacteria that forms on teeth every day. If it sits long enough, minerals in saliva harden it into tartar, which is the rough, yellow or brown material you can see. This matters because plaque is the starting point of gum disease. Gum (periodontal) disease is infection and inflammation of the tissue surrounding the teeth, caused by many different bacteria collecting at and below the gum line [1]. The infection inflames the gums, the ligaments that anchor the teeth, and the surrounding bone [1]. There are two forms. Gingivitis is the early, reversible stage. Periodontitis is the more advanced stage, where the supporting structures of the tooth are damaged. If periodontal disease goes untreated, teeth can be lost because their supporting tissues are destroyed [1]. Gum disease is not rare. Periodontal diseases are the most frequently diagnosed problem in cats [4]. In one large group of cats that needed teeth removed, periodontitis was the most common reason, accounting for about a third of extractions [2]. ## What Pet Owners Notice First Cats hide mouth pain well, so the first clue is often something you see or smell instead of a cry of pain. - Yellow, brown, or orange-brown material along the gum line - Bad breath - Red or swollen gums, especially where the tooth meets the gum - Drooling or dropping food while eating - Chewing on one side or preferring soft food - Pawing at the mouth - Losing weight or eating less In a survey of cat owners, the most commonly recognized sign of dental disease was a change in eating behavior, followed by gingivitis, bad breath, pain, and dental calculus (tartar) [3]. If your cat's breath has changed, our article on [Why Does My Cat's Breath Smell?](/knowledge/veterinary-medicine/dental-care/why-does-my-cats-breath-smell) walks through what different odors can mean. ## Causes of Yellow, Brown, Orange, and Red Discoloration Color is a clue, but it is not a diagnosis. Here is what each shade tends to suggest. ### Yellow or Brown Teeth This is the classic tartar pattern. Plaque mineralizes into a hard layer that traps more bacteria and stains over time. The longer it stays, the more it irritates the gums and the deeper the infection can spread below the gum line [1]. ### Orange Teeth Orange or rusty-brown staining often follows the same tartar pathway, with pigments from food, saliva, or bacteria settling into the rough surface. It can also appear after bleeding around the gums, since blood pigments can stain plaque. Any orange coating that sits at the gum line deserves a look, because that is where periodontal infection lives [1]. ### Red Teeth or Red Gums Red is usually about inflammation. Gingivitis makes the gum tissue red, swollen, and tender. Redness can also reflect bleeding from irritated gums, or injury to a tooth. Red gums are a sign that the tissue around the tooth is actively inflamed [1]. ### Other Causes Worth Knowing Not every discoloration is tartar. Tooth resorption is a condition in which the tooth structure itself breaks down, and it was the third most common reason for tooth extraction in one large cat population [2]. Trauma, worn enamel, and some medications or infections can also change tooth color. A tooth that turns gray, pink, or dark after a fall or a bump needs prompt attention. Sometimes yellow shows up in the mouth for reasons that have nothing to do with teeth. Yellow gums or yellow skin can point to liver or blood problems. If the yellow color is in the gums instead of on the teeth, read [Why Is My Cat having yellow tinge to gums? Feline Cholangitis and Hepatic Lipidosis](/knowledge/veterinary-medicine/symptom-guides/why-is-my-cat-having-yellow-tinge-to-gums-feline-cholangitis-and-hepatic-lipidosis). ### Risk Factors - Age. Periodontitis and tooth resorption both become more common as cats get older [2]. - No home brushing. Plaque returns quickly when teeth are not kept clean, and gingivitis will come back if teeth are not kept free of plaque [1]. - Existing gum disease. Once infection is established below the gum line, it does not clear up on its own [1]. - Certain health conditions. Cats that do not respond to treatment for gingivitis should be checked for other diseases, including immune system problems, diabetes, and feline Bartonella infection (cat scratch fever) [1]. ## How Veterinarians Diagnose the Problem Your veterinarian starts by looking in your cat's mouth, checking the gums, and measuring the depth of the space between each tooth and the gum. That measurement shows whether the attachment around a tooth is being lost. Full mouth dental radiographs (X-rays) are a key step. In one study of cats needing extractions, every cat had a thorough dental examination and full mouth dental radiographs to classify each tooth's condition [2]. X-rays reveal problems below the gum line that cannot be seen by eye, including bone loss and tooth resorption. Your veterinarian may also recommend blood work before anesthesia. If gum disease does not improve after treatment, further testing may be needed to look for other diseases such as immune system problems, diabetes, or Bartonella infection [1]. ## Treatment Options ### Professional Dental Cleaning The core treatment for gingivitis and periodontitis is a professional dental cleaning by your veterinarian, which requires anesthesia [1]. This includes cleaning below the gum line, where the infection actually lives [1]. Cleanings performed without anesthesia may make the tooth look better, but they do not treat the underlying problem of plaque below the gum line [1]. After cleaning, your veterinarian may apply a sealant to the teeth to prevent bacterial buildup and improve healing [1]. ### Extractions and Advanced Care When a tooth is too damaged to save, extraction may be the kindest option. Periodontitis, feline chronic gingivostomatitis, and tooth resorption were the three most frequent reasons for tooth extraction in a large group of cats [2]. Extractions are done with appropriate methods based on each tooth's condition, and pain control is part of good care [2]. ### Pain Management Dental disease hurts. If your cat needs extractions, your veterinarian will plan pain relief, which can include local nerve blocks in the mouth along with other medications [5]. Never give your cat human pain relievers. Your veterinarian will calculate any dose from your cat's weight and health. ### Why Treatment Matters Beyond the Mouth Gum disease does not stay in the mouth. Periodontal disease can contribute to systemic diseases, and oxidative stress is one possible link between periodontitis and problems elsewhere in the body [4]. In one case report, a cat with a two-year history of chronic diarrhea improved after periodontal disease was treated with multiple extractions [5]. That is one cat, so it does not prove cause and effect, but it shows why veterinarians take oral infection seriously. ## Color Clues at a Glance | What You See | Likely Meaning | What To Do | |---|---|---| | Yellow or brown film at the gum line | Plaque and tartar, early gum disease [1] | Book a dental exam and cleaning | | Orange or rusty staining | Tartar with pigment, sometimes from gum bleeding [1] | Have the gums checked | | Red, swollen gums | Gingivitis, active inflammation [1] | Professional cleaning under anesthesia [1] | | Gray, pink, or dark tooth | Possible tooth resorption or trauma [2] | Dental X-rays to assess the tooth [2] | | Yellow gums or skin (not teeth) | Possible liver or blood problem | Contact your veterinarian promptly | ## Recovery, Outlook, and Long-Term Management The outlook is good when gum disease is caught early. Gingivitis usually responds to a thorough professional cleaning under anesthesia, including cleaning below the gum line [1]. If it does not improve, your cat should be examined again to see whether more extensive cleaning is needed [1]. The catch is that gingivitis will come back if the teeth are not kept clean and free of plaque [1]. That means the cleaning is a fresh start, not a cure. What you do at home afterward decides how long the improvement lasts. After extractions, many cats eat better once the sore teeth are gone, even with fewer teeth. Cats chew with a shearing, guillotine-like motion and swallow quickly, chewing only a few times per bite [6]. That anatomy helps them adapt well to changes in the mouth. Plan on regular veterinary dental checkups. Your veterinarian can track gum measurements and decide when another cleaning is needed. ## Prevention ### Brush Your Cat's Teeth Tooth brushing is the single most effective preventive measure, and it was the most frequently reported home care step among cat owners in one survey [3]. In that same survey, 47% of owners reported doing some form of preventive oral care, and 28% brushed their cat's teeth, often not frequently enough [3]. Daily brushing is the goal. Use a soft cat toothbrush and pet-safe toothpaste. Never use human toothpaste. Start slowly, let your cat taste the paste, and build up to brushing a few teeth at a time. ### Make Chewing Work for You Dental chews and toys can help, but they should match a cat's mouth and chewing style. Cats shear food with a guillotine-like motion and chew only a few times before swallowing [6]. A chew that is too large or too hard can be useless or even harmful. Ask your veterinarian what size and type suits your cat. ### Keep Up With Checkups Dental problems are common and many are preventable with tooth brushing, yet owner knowledge and preventive habits vary widely [3]. A yearly exam, or more often for older cats, lets your veterinarian catch yellow buildup before it becomes deep infection. For a step-by-step home routine, see [Prevent Dental Problems In Cats](/knowledge/veterinary-medicine/dental-care/prevent-dental-problems-in-cats). ## Limitations and When to Contact a Veterinarian This article cannot tell you what is happening in your cat's mouth. Only a veterinarian who examines your cat, and likely takes dental X-rays, can do that. Individual cases need a veterinarian. Contact your veterinarian the same day if you notice: - A tooth that has turned gray, pink, or dark after an injury - Bleeding from the mouth that does not stop - Drooling combined with not eating - Swelling on the face or under the eye - Yellow gums or yellow skin Seek emergency care now if your cat: - Cannot close its mouth or has a jaw that looks out of place - Is struggling to breathe - Has heavy bleeding from the mouth - Collapsed or is very weak Call for a routine visit if you see yellow or brown buildup on the teeth, bad breath, red gums, or any change in chewing or appetite. These signs rarely fix themselves, and early treatment is simpler and kinder than waiting. ## Frequently Asked Questions ### Can yellow teeth in cats be reversed? Early yellow staining from plaque and tartar can be removed with a professional cleaning, and gingivitis often improves with that treatment [1]. The color itself is not the point. What matters is whether infection has reached below the gum line, and only your veterinarian can determine that. ### Is it normal for older cats to have yellow teeth? Yellow buildup becomes more common with age, and periodontitis and tooth resorption both increase in prevalence as cats get older [2]. Common is not the same as harmless. Older cats still benefit from dental care, and your veterinarian will assess anesthesia risk before any procedure. ### My cat's teeth look orange. Is that serious? Orange staining usually reflects tartar with pigments trapped in it, sometimes from bleeding gums. It is a reason to have the mouth examined, because the gum line is where periodontal infection develops [1]. If the orange color is on the gums instead of the teeth, that is a different and more urgent concern. ### Do dental cleanings without anesthesia work? No. Cleanings done without anesthesia may make the tooth look better, but they do not treat the underlying problem of plaque below the gum line [1]. The infection that damages teeth and bone lives under the gums, where a conscious cat will not allow thorough cleaning. ### How often should I brush my cat's teeth? Daily brushing is the goal, since plaque returns quickly and gingivitis will come back if teeth are not kept clean and free of plaque [1]. In one survey, 28% of owners brushed their cat's teeth, but often not frequently enough [3]. If daily is not realistic at first, aim for as many days per week as you can manage and build from there. ## Related Articles - [Why Is My Cat having yellow tinge to gums? Feline Cholangitis and Hepatic Lipidosis](/knowledge/veterinary-medicine/symptom-guides/why-is-my-cat-having-yellow-tinge-to-gums-feline-cholangitis-and-hepatic-lipidosis) - [Why Does My Cat's Breath Smell?](/knowledge/veterinary-medicine/dental-care/why-does-my-cats-breath-smell) - [Prevent Dental Problems In Cats](/knowledge/veterinary-medicine/dental-care/prevent-dental-problems-in-cats) - [Why Is My Cat So Itchy?](/knowledge/veterinary-medicine/parasitic-diseases/why-is-my-cat-so-itchy) - [Cat Ear Infection with Redness: Causes and When to Worry](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-ear-infection-with-redness-causes-and-when-to-worry) - [Why Is My Cat having pale pink gums? Anemia Shock and Cardiac Disease](/knowledge/veterinary-medicine/symptom-guides/why-is-my-cat-having-pale-pink-gums-anemia-shock-and-cardiac-disease) ## References 1. [Dental Disorders of Cats - Cat Owners](https://www.merckvetmanual.com/cat-owners/digestive-disorders-of-cats/dental-disorders-of-cats). Merck Veterinary Manual. 2. [The prevalence of reasons for tooth extraction in cats](https://pubmed.ncbi.nlm.nih.gov/40727267/). Frontiers in veterinary science, 2025. 3. [Dental Problems and Prophylactic Care in Cats-Knowledge and Perceptions among Swedish Cat Owners and Communication by Veterinary Care Staff](https://pubmed.ncbi.nlm.nih.gov/34573537/). Animals : an open access journal from MDPI, 2021. 4. [Moderate to advanced periodontitis contributes to increased oxidative stress in cats: a case-control study](https://pubmed.ncbi.nlm.nih.gov/38849865/). BMC veterinary research, 2024. 5. [Resolution of Chronic Diarrhoea Following Treatment of Periodontal Disease in a Cat](https://pubmed.ncbi.nlm.nih.gov/41828967/). Animals : an open access journal from MDPI, 2026. 6. [Development of dental hygiene gum for cats considering their anatomical features of dentition](https://pubmed.ncbi.nlm.nih.gov/31565890/). Journal of veterinary science, 2019. ## Further Reading - [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) - [American Veterinary Medical Association: Pet Care](https://www.avma.org/resources-tools/pet-owners/petcare)