Common Causes of Teeth Staining
Teeth can become discolored over time due to various factors: 
- Food and Drinks — Certain foods and beverages contain strong pigments that can stain tooth enamel over time. Some of these include coffee, tea, red wine, dark sodas, berries, soy sauce, and tomato sauces.
- Tobacco Use — Smoking or chewing tobacco is a major contributor to yellowing and brown stains on teeth. Nicotine and tar adhere to enamel and are difficult to remove with regular brushing.
- Aging — As we age, the outer enamel layer of teeth gradually wears away, revealing the naturally yellow dentin underneath, which can make teeth appear darker.
- Poor Oral Hygiene — Inadequate brushing and flossing can lead to plaque and tartar buildup, which can trap stains and make teeth look dull or yellow.
- Medications — Certain medications can cause tooth discoloration. Some of these include antihistamines, antipsychotics, and high blood pressure medications.
- Dental Trauma — Injury to a tooth can damage the inner pulp and lead to discoloration over time.
- Genetics and Fluoride — Some people naturally have enamel that is more prone to staining, and excessive fluoride exposure in childhood can lead to discoloration known as "dental fluorosis."
