What are the black marks on my teeth?

Black marks on teeth can be caused by a variety of factors, including:

1. Tooth decay: This is the most common cause of black marks on teeth. When bacteria in the mouth break down the sugars in food, they produce acids that attack the teeth and cause them to decay. If left untreated, tooth decay can lead to cavities.

2. Tartar: Tartar is a hard, calcified deposit that forms on the teeth when plaque is not removed. Tartar can be black, brown, or yellow in color. It can cause the teeth to look unsightly and can also lead to gum disease.

3. Staining: Black marks on the teeth can also be caused by staining from certain foods, drinks, or tobacco products. For example, coffee, tea, red wine, and cigarettes can all stain the teeth.

4. Medications: Certain medications, such as tetracycline and minocycline, can cause the teeth to turn black. These medications are usually used to treat acne or infections.

5. Medical conditions: Some medical conditions, such as Addison's disease and iron deficiency anemia, can also cause the teeth to turn black.

If you have black marks on your teeth, it is important to see a dentist to determine the cause and get the appropriate treatment.