Rotten teeth causes
Tooth decay develops when plaque bacteria use sugars to make acids that dissolve enamel and dentine.
The short answer
Tooth decay develops when plaque bacteria use sugars to make acids that dissolve enamel and dentine. An untreated cavity can deepen into the pulp, causing pain or infection.
What is the direct answer?
What does this question mean?
A decayed tooth is not simply dirty; its mineral structure has been chemically damaged. Frequent sugar exposure, plaque retention, reduced saliva, exposed roots, and poor access for cleaning can all contribute.
What can you do next?
Brush twice daily with fluoride toothpaste, clean between teeth, and reduce repeated sugary drinks or snacks. A dentist may remove the softened tissue and place a filling, or treat the pulp if decay has reached it.
When should you seek dental care?
Book an examination for a hole, dark or softened area, food trapping, sensitivity, toothache, swelling, or a broken tooth. Facial swelling, fever, difficulty swallowing, or difficulty breathing needs urgent care.
What should you ask the dentist?
Ask how deep the lesion is and whether an X-ray is needed. Ask whether the tooth needs fluoride support, a filling, pulp treatment, or removal, and how to protect the remaining teeth.
Frequently asked questions
Can a rotten tooth heal by itself?
A cavity that has formed a hole cannot regrow tooth structure, although early mineral loss may be managed with fluoride and plaque control.
Why do rotten teeth hurt?
Pain can result from exposed dentine, inflammation inside the pulp, or infection around the root.