Tooth Decay: How It Starts and How to Stop It
Cavities are a slow process, and the early stage can still be reversed
Healthlife Editorial Team
Medical writers
In simple terms
What really causes decay, why frequency of sugar matters more than quantity, and modern treatments.
How a cavity forms
Bacteria in dental plaque turn sugars into acid. Each time, the acid dissolves a little mineral from the enamel. Saliva repairs the damage between meals. Decay appears when attacks are too frequent for repair to keep up.
Frequency beats quantity
Sipping a sweet drink over an hour is far more damaging than drinking it in five minutes. Aim for meals and one snack, with water in between.
Prevention that is proven
- Brush twice a day with fluoride toothpaste, and spit without rinsing
- Clean between the teeth daily with floss or interdental brushes
- Fluoride sealants on children's molars
- A dental check-up at the interval your dentist advises
Treatments
- Very early decay: fluoride varnish and better habits can remineralise it
- Established cavity: a filling to remove decay and rebuild the tooth
- Deep decay reaching the nerve: root canal treatment, then a crown
When to see a dentist
- Pain that wakes you at night or lingers after hot or cold
- Swelling of the face or gum, with or without fever (urgent)
- A visible hole or a tooth that has darkened
This article explains general health information in simple language. It does not replace advice from your own doctor.
The words explained
Medical terms used above, in everyday language.
- Prevention
- Steps taken before a problem starts, to make it less likely.
When should you see a doctor?
- Your symptoms last more than a few weeks or keep coming back.
- They get worse quickly, or stop you doing everyday things.
- You notice sudden pain, breathing trouble, fainting or bleeding — seek urgent care.
- You already take medication and want to change anything about it.
This article explains general health information. It does not replace advice from your own doctor.
Frequently asked questions
- What is Tooth Decay: How It Starts and How to Stop It?
- What really causes decay, why frequency of sugar matters more than quantity, and modern treatments.
- What are the main symptoms or signs of Tooth Decay: How It Starts and How to Stop It?
- Common signs vary from person to person. The article above lists the symptoms to watch for, how they progress, and when they need medical attention.
- When should you see a doctor for Tooth Decay: How It Starts and How to Stop It?
- See a doctor if symptoms last more than a few weeks, get worse quickly, stop you doing everyday things, or if you notice sudden pain, breathing trouble, fainting or bleeding.
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