Why are My Teeth Yellow? A Guide for Yellow Teeth and Brighter Smiles

Jan 4, 2019 | Cosmetic Treatments

Have you asked yourself, “why are my teeth yellow?” If you have, and are considering doing something about it, you’re not alone. Between 18-52% of people aren’t happy with the colour of their teeth.

Let’s take a look at what causes your teeth to yellow, then see how to fix yellow teeth.

Why Are My Teeth Yellow?

Why are teeth yellow? The answers to that question are most often related to diet and lifestyle.


Many common foods are high in tannins, like red wine. Tannins stain your teeth. Other food discolourations come from fizzy drinks and coffee. All of these get into your teeth’s enamel. The result is long-term staining or discolouration.


Smoking is one of the worst causes of yellow teeth. Tobacco stains on your teeth are difficult to remove. The best way to handle stains is to quit the habit altogether and maintain good oral hygiene.

On saying that, ex-smokers will still need either whitening treatments or teeth-whitening products to remove those stubborn stains.

Lack of Oral Hygiene

Poor oral hygiene causes yellow teeth. Those who don’t brush regularly will discover they have this problem as plaque builds on their teeth.


Age also causes teeth to yellow. As people age, the enamel on their teeth thins. Eventually, the layer under the enamel, which is called dentin, starts showing through. Dentin is yellowish in colour. In this case, bleaching products and treatments won’t work.


Certain medical conditions and the medications used to treat them can cause your teeth to be yellow. For example, patients who have had chemotherapy for cancer to the head or neck may be left with yellow teeth.


Certain medications, like those for asthma and high blood pressure, can also cause teeth to be yellow.

How to Make Yellow Teeth Whiter

When it comes to whitening teeth, you have several options. Before proceeding with any of them, see your dentist for his or her recommendations.

Also, pair any of the following treatments with proper brushing and flossing to maintain your results. Also, be sure to avoid the food and drinks that can re-stain your teeth.


Dental bonding is a procedure in which your dentist applies a tooth-coloured resin to your teeth. The resin hardens and bonds to your teeth to improve your smile.

Dental Veneers

Dental veneers are also called porcelain veneers or laminates. They are thin, custom-made shells that are tooth-coloured. They cover the front surface of your teeth to improve your appearance.

Your dentist can apply a veneer to change the colour of your teeth (from yellow teeth to white), as well as the shape, size and length if needed.

Teeth Whitening at the Clinic

Your dentist can perform teeth whitening procedures at the clinic. These procedures are effective and safe. They use bleaching agents that lighten your teeth without removing the enamel.

Home Whitening Treatments

Whitening treatment involves hydrogen peroxide gels in special trays. These trays fit your mouth like gum shields. However, they are not advised because they are unregulated and untested. In addition, hydrogen peroxide levels are generally low and the potential for side-effects such as sensitivity are more likely.

More Questions on How to Whiten Yellow Teeth?

You now know the answer to the question, “Why are my teeth yellow?” Though, you may still have questions as to which treatment method is the right one for you.

We’d love to answer those questions for you. If you are in the Limerick area, please contact us to make an appointment.

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