Common causes of teeth discolouration

Common Causes of Teeth Discolouration

A variety of reasons can cause teeth discolouration. If you want to maintain a pearly white smile, knowing these reasons can help you and your dentist better manage and prevent teeth stains.

If your teeth are not as white as they used to be, here are some of the common causes of why you may be experiencing teeth discolouration.

Poor Dental Hygiene

It goes without saying that poor dental hygiene is one of the primary reasons for teeth discolouration. If you fail to brush and floss regularly, bacteria and food particles can build up in your teeth and make them yellowish or dull. When poor oral dental care is paired with some of the other reasons in this list, then it makes you more prone to having teeth discolouration.

Tobacco Use

Smoking or chewing tobacco is a lifestyle habit that stains teeth. Aside from yellowing your teeth, tobacco use also increases your chance of catching gum disease and other oral health issues.


Your common food choices change your teeth’s lustre. Some beverages with high acidity such as coffee, tea, wine, soda, and some juices have staining effects. Brightly coloured foods like apples, beets, blueberries, raspberries, tomatoes, citrus fruits, and candies are also stain-causing when consumed too frequently.


As we age, our tooth’s thin outer covering called the enamel slowly wears down. As this happens, the next layer of the tooth which is called the dentin starts to show up. Dentin is yellowish in colour. This is why our teeth get yellower as we age.

Certain Diseases

Some diseases prevent the normal development of the tooth’s exterior (enamel) and the layer underneath it (dentin) which leads to discolouration. Medical conditions that impact the tooth enamel include calcium deficiency, metabolic diseases, rickets, liver diseases, celiac diseases, and eating disorders.


Certain drugs can contribute to teeth discolouration. This includes antihistamines, antipsychotic drugs, antidepressants, and antihypertensive medications (drugs that manage high blood pressure). For children of developing age, antibiotics like tetracycline and doxycycline can also discolour teeth. Medical treatments like head and neck radiation, and chemotherapy have the same teeth discolouration effect.


While the causes listed above may contribute to teeth discolouration, you may also be experiencing duller or yellowish teeth because it’s in your genes. Genetics determine the thickness of your enamel. If having thin enamel is in your genes, then the dentine or the naturally yellow layer of your teeth is more visible. This makes your teeth appear yellower.


After knowing the potential causes of your teeth’ discolouration, it’s time to consult your dentist on what options are best for your staining. Whether your teeth are stained from any of the reasons above, the good news is that reversing your dull teeth is within your reach.

You can now say goodbye to teeth discolouration and have your teeth whitened at Dentaluxe. Enjoy a brighter smile and contact us, or book an appointment now. You may also visit our blog for more tips and information on dental care and teeth whitening.



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