Methamphetamine (often called meth, ice, crystal or speed) is a powerful drug that can have serious effects on many parts of the body, including the mouth.

Dental problems linked with meth use can be severe, but understanding the risks can help people protect their oral health and seek care early.

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How can meth affect the mouth?

Meth use can increase the risk of:

• Severe tooth decay.
• Dry mouth (reduced saliva).
• Gum disease.
• Tooth wear from grinding or clenching.
• Acid damage to enamel.
• Increased cravings for sugary drinks and foods, which raise the risk of decay.
• Difficulty keeping up with daily oral hygiene.

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What changes might happen to the teeth?

People who use meth may notice:

• Teeth becoming discoloured.
• Teeth breaking down or crumbling.
• Increased sensitivity or pain.
• Loose or missing teeth.

Without treatment, dental problems can become advanced and may require complex care.

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Why does this damage happen?

Several factors work together:

• Dry mouth: Meth can reduce saliva. Saliva helps wash away bacteria and protect teeth from decay.
• Sugar intake: Sugary drinks and snacks increase acid attacks on teeth.
• Teeth grinding or clenching: This can cause cracks, fractures and jaw pain.
• Oral hygiene challenges: When routines change, plaque builds up more easily.
• Acidic effects: Meth itself can contribute to enamel damage.

The longer and more frequently meth is used, the greater the risk to oral health.

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The good news

Dental professionals are there to help, not judge. Even if teeth are already damaged, treatment can:

• Relieve pain.
• Treat infections.
• Restore function and appearance where possible.
• Help prevent further problems.

If you are finding it hard to cut down or stop using drugs, your dentist or GP can help you access specialist support services.

Looking after your mouth can make a real difference. Simple steps include:

• Brush your teeth for 2 minutes, last thing at night and at least once more during the day, with fluoride toothpaste.
• Clean between your teeth with interdental brushes or floss.
• Drinking water regularly.
• Visit your dental team as often as they recommend.