Smile Dry mouth: causes, risks and relief
Dry mouth happens when you do not make enough saliva. Saliva protects your teeth, so ongoing dry mouth raises the risk of cavities, gum disease and bad breath.
Common causes
- Many medicines, including some for allergies, blood pressure and depression.
- Dehydration, mouth breathing and snoring.
- Smoking, alcohol and caffeine.
- Some health conditions and cancer treatments.
- Getting older, although dry mouth is not a normal part of ageing and is often linked to medicines.
What can help
- Sip water regularly and drink water with meals.
- Chew sugar-free gum or suck sugar-free sweets to help saliva flow.
- Use a saliva substitute or a mouth moisturiser if advised.
- Avoid smoking, alcohol-based mouthwash and sugary snacks.
- Use a fluoride toothpaste and go for regular dental check-ups.
When to get advice
See a doctor or dentist if dry mouth lasts, or if you have trouble swallowing, speaking or tasting. Do not stop a medicine without speaking to your doctor first.
Quick answers
Why is my mouth dry at night?
Mouth breathing, snoring, dehydration and some medicines can cause dry mouth overnight.
Can dry mouth cause cavities?
Yes. Less saliva means less natural protection for teeth, so cavities become more likely.
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